feat(version): support --version flag #138
Merged
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This adds support for the
--version
CLI flag. This outputs the versionnumber for both shx and the bundled version of ShellJS. This adds a test
to strictly assert the output format, so that this can be reliably
parsed if necessary.
This also reorganizes the structure of some test cases (without changing
their logic).
Lastly, this changes the file modes for 2 files. These were previously
unnecessarily executable.
Fixes #111
Test: case: 'supports --version'