Reduce code duplication between DI extensions
Fix some random CS issues.
Sync `composer.json` files content
Reduce code duplication in DI extensions
Fix broken specs
Merge pull request #436 from stloyd/bugfix/cs

[WIP] Fix some random CS issues.
Enhance Shipping Method Widget

This PR adds shipping cost to the shipping method choice display.
It is a simpler version of https://github.com/Sylius/Sylius/pull/364
Merge pull request #438 from Richtermeister/shipping-choice-widget

Enhance Shipping Method Widget
Reduce code duplication in DI extensions.
Merge pull request #439 from stloyd/bugfix/cs

[RFC] Reduce code duplication in DI
Fixing random cs