Mirakuru

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Misc
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- Moved CI to Github Actions
- Blackified codebase
- Compacted Documentation into readme (was pretty small anyway)

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- [enhancement] Ability to set up expected exit code for executor. In Java exit codes 1- 127 have
special meaning, and the regular exit codes are offset by those of special meaning.

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- [enhancement] If process is being closed and the shutdown won't be clean (won't return exit code 0)
mirakuru will now rise ProcessFinishedWithError exception with exit_code

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- [bugfix][macos] Fixed typing issue on macOS

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- [bug] Always close connection for HTTPExecutor after_start_check
- [enhancement] Log debug message if execption occured during
HTTPExecutor start check
- [ehnancement] adjust typing handling in HTTPExecutor

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- [feature] Drop support for python 3.5. Rely on typing syntax and fstrings that
is available since python 3.6 only
- [ehnancement] For output executor on MacOs fallback to `select.select` for OutputExecutor.
Increases compatibility with MacOS where presence of `select.poll` depends
on the compiler used.
- [enhancement] Apply shelx.quote on command parts if command is given as a list
Should result in similar results when running such command with or without shell.