Adding linting to a.js integrations

@calvinfo @amillet89 Do we need to add anything to the test/style.json? I also wasn't sure what the go was with the Makefile, so I just added all the bits in that looked relevant :)
Yeah, I know. I needed to find the one space that was missing or something, so I ended up formatting it myself, then didn't want to un-format it haha.