fix: False-positive no-extraneous-import when using the tsconfig > paths alias import

[MorevM]

Closes #379

I decided to be as minimalistic as possible in the changes (still, it fixes the problem) :)

The original solution proposed in the issue didn't work for me, because calculating resolverConfig depends on moduleType, but calculating the correct moduleType requires partially filling resolverConfig (in particular resolverConfig.alias), which would result in calling a separate method twice, which is obviously less performant, so I just inserted the necessary check into the getModuleType definition.

[MorevM]

The falling type test is not caused by this change, and I honestly have little desire to fix it :)

[aladdin-add]

Yes, the master branch is also failing (it may be due to recent eslint type changes). I'll try to investigate it later.

[aladdin-add]

LGTM, thanks!