Add support for multiple error codes

[patrick91]

Another one 😊

This PR improves the code that adds type ignores by adding support for multiple error codes, for example this line:

a: str = len(1)

returns the following errors:

mypy-silent ❯ poetry run mypy hello.py
hello.py:1: error: Incompatible types in assignment (expression has type "int", variable has type "str")
hello.py:1: error: Argument 1 to "len" has incompatible type "int"; expected "Sized"
Found 2 errors in 1 file (checked 1 source file)

With this PR the result of mypy silent becomes this:

a: str = len(1)   # type: ignore[assignment, arg-type]

[codecov]

Codecov Report

Merging #44 (ad89e56) into master (cdec344) will increase coverage by 7.61%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
+ Coverage   47.94%   55.55%   +7.61%     
==========================================
  Files           4        4              
  Lines          73       81       +8     
==========================================
+ Hits           35       45      +10     
+ Misses         38       36       -2     

Impacted Files	Coverage Δ
mypy_silent/cli.py	0.00% <ø> (ø)
mypy_silent/maho.py	100.00% <100.00%> (ø)

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[chadrik]

Any chance we can get this merged, or do we need to fork this project?

[patrick91]

@chadrik it could be cool to make one that works for mypy, ty, pyright and so on 👀