Hi! 👋

TSLint no longer builds using TypeScript 3.8, and we'd like to fix the source code up to at least be able to build TSLint, without adding new features. I talked with @JoshuaKGoldberg a bit about this last Friday, and we seemed to think this was a feasible idea 😄This issue is mostly just for tracking our effort, and fielding if TSLint would be open to PR's before we begin implementation.