fix(cli): find axe-core when installed globally

[michael-siek]

See: #229
This issue only happens when installing @axe-core/cli globally.

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[stephenmathieson]

I think we could better solve this using Node's module lookup algorithm.

axe_core_file_path = require.resolve('axe-core')

This will return the nearest installed axe-core. It works both when installed globally and as a project dependency.

resolved

[WilcoFiers]

Tests

[stephenmathieson]

Writing a proper test for this will be difficult. To actually reproduce the problem, we'd have to globally install the program and run it. Not really something that qualifies as a "unit test" IMO. Furthermore, we're using Node's algorithm now, which we already assume works (otherwise, nothing here would). Since the existing tests pass, and this is removing custom logic and replacing it with Node's require, do we really need to setup an E2E test for this?

resolved

resolved