implement new lint rules

[collin]

no-else-return and "space-before-function-paren": [1, "never"],

@daytonn @kand re: some cleanup from review and getting the function paren style tightened down.

[collin]

This looks big, but it's just linter stuff.

[kand]

We should have spaces before function parens.

As with all linter rules we're splitting hairs, but it differentiates function calls from function definitions at a glance, given that function calls do not have spaces between the name and the parens.

[collin]

I concur with your reasoning for switching space-before-function-paren from never to always.

[coveralls]

Coverage remained the same at 97.746% when pulling a2cd356 on lint-rule-changes into 064b604 on master.

[kand]

👍

[coveralls]

Coverage remained the same at 97.746% when pulling c07e191 on lint-rule-changes into 064b604 on master.

[daytonn]

👍