Fix stack overflow issue Milad-Akarie#78

wip refactoring some old code

fix importing issue for bin/test folders
support injectables in register module custom initializr

fix parameterized dependencies aren't resolved properly

minor fixes

fix registered abstract dependencies are reported missing.

fix registering third party types as singleton throws an error.

fix resolve by instanceName is using positional var instead of named

fix part files are imported as stand alone
change flutter example project to pure-dart project

wip add support for get_it v4.0.0

improve support for custom initializers

fix src import issue

- remove flutter dependency

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

- fix type in @Environment annotation

- ignore abstract classes in auto mode.

Merge pull request Milad-Akarie#6 from Milad-Akarie/dev


- You now need to pass in your getIt instance to @initGetIt() func
- Rename @Bind to @RegisterAs to avoid confusion because,
  now we're annotating the implementation not the abstract.
- Add @factorymethod annotation to mark named factories and static create methods.
- Add @registerModule annotation to support registering third party types.
- Fix eager singletons are registered before their dependencies.