我现在有Laravel 5.7。*。我尝试通过更改composer.json文件来升级它。当我运行作曲家更新时，出现以下错误：
composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- laravel/framework 5.7.x-dev requires laravel/nexmo-notification-channel ^1.0 -> satisfiable by laravel/nexmo-notification-channel[1.0.x-dev,v1.0.0,v1.0.1].
- laravel/nexmo-notification-channel v1.0.1 requires nexmo/client ^1.0 -> satisfiable by nexmo/client[1.9.0] but these conflict with your requirements or minimum-stability.
- laravel/nexmo-notification-channel v1.0.0 requires nexmo/client ^1.0 -> satisfiable by nexmo/client[1.9.0] but these conflict with your requirements or minimum-stability.
- laravel/nexmo-notification-channel 1.0.x-dev requires nexmo/client ^1.0 -> satisfiable by nexmo/client[1.9.0] but these conflict with your requirements or minimum-stability.
- Conclusion: remove gloudemans/shoppingcart 2.6.0
- Conclusion: don't install laravel/framework v6.5.1
- Conclusion: don't install laravel/framework v6.5.0
- Conclusion: don't install laravel/framework v6.4.1
- Conclusion: don't install laravel/framework v6.4.0
- Conclusion: don't install laravel/framework v6.3.0
- Conclusion: don't install laravel/framework v6.2.0
- Conclusion: don't install laravel/framework v6.1.0
- Conclusion: don't install laravel/framework v6.0.4
- Conclusion: don't install laravel/framework v6.0.3
- Conclusion: don't install laravel/framework v6.0.2
- Conclusion: don't install laravel/framework v6.0.1
- Installation request for gloudemans/shoppingcart ^2.6 -> satisfiable by gloudemans/shoppingcart[2.6.0].
- Conclusion: don't install laravel/framework v6.0.0
- gloudemans/shoppingcart 2.6.0 requires illuminate/events 5.1.* || 5.2.* || 5.3.* || 5.4.* || 5.5.*|| 5.6.* || 5.7.* -> satisfiable by laravel/framework[v5.7.15,5.2.x-dev,5.3.x-dev,5.4.x-dev,5.5.x-dev,5.6.x-dev,5.7.x-dev],illuminate/events[5.1.x-dev,5.7.17,5.7.18,5.7.19,5.7.x-dev,v5.1.1,v5.1.13,v5.1.16,v5.1.2,v5.1.20,v5.1.22,v5.1.25,v5.1.28,v5.1.30,v5.1.31,v5.1.41,v5.1.6,v5.1.8,v5.2.0,v5.2.19,v5.2.21,v5.2.24,v5.2.25,v5.2.26,v5.2.27,v5.2.28,v5.2.31,v5.2.32,v5.2.37,v5.2.43,v5.2.45,v5.2.6,v5.2.7,v5.3.0,v5.3.16,v5.3.23,v5.3.4,v5.4.0,v5.4.13,v5.4.17,v5.4.19,v5.4.27,v5.4.36,v5.4.9,v5.5.0,v5.5.16,v5.5.17,v5.5.2,v5.5.28,v5.5.33,v5.5.34,v5.5.35,v5.5.36,v5.5.37,v5.5.39,v5.5.40,v5.5.41,v5.5.43,v5.5.44,v5.6.0,v5.6.1,v5.6.10,v5.6.11,v5.6.12,v5.6.13,v5.6.14,v5.6.15,v5.6.16,v5.6.17,v5.6.19,v5.6.2,v5.6.20,v5.6.21,v5.6.22,v5.6.23,v5.6.24,v5.6.25,v5.6.26,v5.6.27,v5.6.28,v5.6.29,v5.6.3,v5.6.30,v5.6.31,v5.6.32,v5.6.33,v5.6.34,v5.6.35,v5.6.36,v5.6.37,v5.6.38,v5.6.39,v5.6.4,v5.6.5,v5.6.6,v5.6.7,v5.6.8,v5.6.9,v5.7.0,v5.7.1,v5.7.10,v5.7.11,v5.7.15,v5.7.2,v5.7.20,v5.7.21,v5.7.22,v5.7.23,v5.7.26,v5.7.27,v5.7.28,v5.7.3,v5.7.4,v5.7.5,v5.7.6,v5.7.7,v5.7.8,v5.7.9].
- Can only install one of: laravel/framework[6.x-dev,5.6.x-dev].
- Can only install one of: laravel/framework[6.x-dev,5.2.x-dev].
- Can only install one of: laravel/framework[6.x-dev,5.3.x-dev].
- Can only install one of: laravel/framework[6.x-dev,5.4.x-dev].
- Can only install one of: laravel/framework[6.x-dev,5.5.x-dev].
- Can only install one of: laravel/framework[6.x-dev,v5.7.15].
- don't install illuminate/events 5.1.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.2.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.3.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.4.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.5.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.6.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.7.17|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.7.18|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.7.19|don't install laravel/framework 6.x-dev
- don't install illuminate/events 5.7.x-dev|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.1|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.13|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.16|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.2|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.20|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.22|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.25|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.28|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.30|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.31|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.41|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.6|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.1.8|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.19|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.21|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.24|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.25|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.26|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.27|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.28|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.31|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.32|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.37|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.43|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.45|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.6|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.2.7|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.3.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.3.16|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.3.23|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.3.4|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.13|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.17|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.19|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.27|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.36|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.4.9|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.16|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.17|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.2|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.28|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.33|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.34|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.35|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.36|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.37|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.39|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.40|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.41|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.43|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.5.44|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.1|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.10|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.11|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.12|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.13|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.14|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.15|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.16|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.17|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.19|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.2|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.20|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.21|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.22|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.23|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.24|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.25|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.26|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.27|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.28|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.29|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.3|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.30|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.31|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.32|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.33|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.34|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.35|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.36|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.37|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.38|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.39|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.4|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.5|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.6|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.7|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.8|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.6.9|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.0|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.1|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.10|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.11|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.15|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.2|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.20|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.21|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.22|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.23|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.26|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.27|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.28|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.3|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.4|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.5|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.6|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.7|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.8|don't install laravel/framework 6.x-dev
- don't install illuminate/events v5.7.9|don't install laravel/framework 6.x-dev
- Installation request for laravel/framework 6.* -> satisfiable by laravel/framework[6.x-dev,v6.0.0,v6.0.1,v6.0.2,v6.0.3,v6.0.4,v6.1.0,v6.2.0,v6.3.0,v6.4.0,v6.4.1,v6.5.0,v6.5.1].
这是因为gloudemans / shoppingcart 2.6.0软件包吗？或由于其他原因导致的错误。我将PHP升级到7.2，还将Nexmo升级到2.0 如果我必须删除gloudemans软件包，那可以替代它吗？