`.gitignore` for contributors (#380)
`.gitignore` for contributors (#380)

* build(.gitignore): Ignore local .venv dirs

* ci(.gitignore): Ignore test/test_package/build

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        test/test_package/build/
kislyuk/argcomplete,kislyuk/argcomplete