GitLab CI - ESLint - "==" and "!="

After this change, errors further reduced as follows:

346 problems (303 errors, 43 warnings)

I carried out some testing, and didn't notice any issues, but I certainly don't know all the ins and outs of the module's JS code.

It shouldn't make a difference unless the code is comparing variables of different types, which should be avoided.

It looks good to me as well. Merged in. Thanks again @lostcarpark!

Automatically closed - issue fixed for 2 weeks with no activity.