- get_it package name is fixed

Add option to generate the initilizer function as an extension
Change initializer functions returns the passed get_it instance instead of void
Add Advanced environment filter that can be extended and customized
Fix Injectable generator not handling multiple instances of generic types #107

Add option to not prefer relative imports in @InjectableInit

Add generation-time check for duplicate dependencies under the same environment
Fix 3rd party imports from src instead of library file issue
Change generated file extension to .config.dart
Change generated file applies to most of effective dart rules including preferring relative imports
Clean up some code

Add generation-time check for duplicate dependencies under the same environment
Fix 3rd party imports from src instead of library file issue
Change generated file extension to .config.dart
Change generated file applies to most of effective dart rules including preferring relative imports
Clean up some code

Add some comments

fix generic types are registered as dynamic
fix unresolved future when registering asynchronous dependencies
change asynchronous dependencies will be registered using async factory unless annotated with @preResolve

fix src import issue

- add support for custom initializers in register Modules
- minor fixes