Import path module as variable instead of default in watcher

[therealtbs]

The usage later on gets transpiled by TypeScript into:

ignored.push(path_1.default.join(entry.filename, '**', '*' + extension));

Note the default, which is incorrect for a commonjs module and causes a crash.

This PR fixes that

[dotansimha]

@therealtbs , actually, @mvestergaard just fixed it a minute after you, but I merged his PR first 😄 #2126

Thank you!!

[therealtbs]

No worries! 😌 Just glad it's fixed