I wanted somewhere to keep track of the breaking changes we should make as part of a 2.0.0 release.

Deprecated Rules:

• (prfeat(eslint-plugin)!: remove deprecated rules #739) remove deprecated ruleprefer-interface (replaced byconsistent-type-definitions)
• (prfeat(eslint-plugin)!: remove deprecated rules #739) remove deprecated ruleno-triple-slash-reference (replaced bytriple-slash-reference)
• (prfeat(eslint-plugin)!: add ruleconsistent-type-assertions #731) remove deprecated ruleno-angle-bracket-type-assertion (replaced byconsistent-type-assertions)
• (prfeat(eslint-plugin)!: add ruleconsistent-type-assertions #731) remove deprecated ruleno-object-literal-type-assertion (replaced byconsistent-type-assertions)

Misc:

• (prfeat: Support eslint@6 #645) Support eslint 6 (drop node 6 support)
• (prfix(eslint-plugin)!: remove "isTypescriptFile". #594) killisTypescriptFile checksMake typescript-eslint rules compatible with .vue files #524
• (prfeat(eslint-plugin)!: add ruleconsistent-type-assertions #731) generalizeno-angle-bracket-type-assertion (Rule suggestion: generalize @typescript-eslint/no-angle-bracket-type-assertion #332) and merge inno-object-literal-type-assertion
• (prfeat(typescript-estree)!: throw error on file not in project whenproject set #760) protection against most common performance pitfall
• (prfix(eslint-plugin): [explicit-function-return-type] Fix allowExpressions ignoring default exports #831)explicit-function-return-typeallowExpressions shouldn't ignoreexport default () => {}
• rename@typescript-eslint/experimental-utils to@typescript-eslint/utils (feat: Move shared types into their own package #425 (review)) will do in v3
• look into renaming a number of rulesSuggestion: standardize against prefixing rule names with "no-" #203 will do with a later major bump..

Recommended stuff:

• reevaluate rule defaults
  • (prfeat(eslint-plugin)!: change recommended config #729) makeexplicit-function-return-type more relaxed by default, as it's the standard usage ([explicit-function-return-type] Consider allowExpressions=true and allowTypedFunctionExpressions=true as default #493)
  • (feat(eslint-plugin)!: [promise-function-async] make allowAny default true #733) Remove theallowAny option from thepromise-function-async rule and make it the default (from comment below)
• (prfeat(eslint-plugin)!: change recommended config #729) update the recommended rule set with new rules (and remove some rules)[recommended] Remove stylistic rules from recommended #651
• (prfeat(eslint-plugin)!: recommended-requiring-type-checking config #846) split the recommended into a base set not requiring type info, and an extension set requiring type info, so people can have a fast experience by default.