Fix for issue #33

[hangie]

This piece of code:

customPath = path.normalize(customPath);

If run on: ${workspaceFolder}/../venv/bin/vale
would result in: venv/bin/vale

The normalize needs to be run after the expansion to achieve the correct result.

[ChrisChinchilla]

Ok, thanks @hangie I'll do some testing. This isn't a feature I use, but I know others use the binary locations quite a bit.

[ChrisChinchilla]

Looks good thanks!