Vampytest

Improvements

- Add `TestFile.has_failed_test`.
- Add `RunnerContext.has_failed_test`.
- Add `TestRunner.get_return_code`.
- Add `TestRunner.set_return_code`.
- `TestRunner.run` now returns its return code instead of a boolean.
- `run_tests_in` now returns its return code instead of none.
- `execute_from_parameters` now returns its return code instead of boolean.
- `__main__` now exits with the respective return code.

Renames, Deprecation & Removals

- Rename `execute_from_terminal` to `execute_from_parameters`.

Bug fixes

- Fix `AttributeError` in an incorrectly updated frame filter.

Improvements

- Use new scarletio in dependencies.

Improvements

- Now its checked whether every dependency is satisfied before importing the framework.

Improvements

- Remove current working directory from `sys.path` in case, we are executing from inside of a library.
This caused confused imports.
- Add cli entry point.

Improvements

- Add new `SourceLoadFailureEvent`.
- The first command line parameter is now auto detected on a smart way.
It tries to resolve the current library we are at, or we are looking at.
- Imports the tested library before running any tests.
This means wont all test fail because of a failing import, instead no tests will run.