chore: Switch from tslint to eslint #1205
Merged
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tslint is end-of-life, and warns when you install it. Additionally, the version we were on didn't support 'import type' expressions, as well as optional-chaining & null coalescing when I tried to use those in #1204
This PR does update a bunch of tslint-disable comments, but otherwise tries to minimally change runtime source in danger-js. If we want to tighten the eslint rules, I'd be super supportive, but I didn't want to cause a ton of thrash, so mostly the rules that are enabled are the ones that don't trigger on tons of existing code.
This PR also upgrades prettier, because that was needed to handle
readonly string[]
arguments.Be aware this PR drops testing support for node 10 in AppVeyor -- b66f86f
@typescript-eslint
doesn't support node 10