remove flow infra and use TS

Author: saihaj

.babelrc-npm.json

@@ -1,5 +1,5 @@
 {
-  "plugins": ["@babel/plugin-transform-flow-strip-types"],
+  "plugins": ["@babel/plugin-transform-typescript"],
   "presets": [
     [
       "@babel/preset-env",

.babelrc.json

@@ -1,5 +1,5 @@
 {
-  "plugins": ["@babel/plugin-transform-flow-strip-types"],
+  "plugins": ["@babel/plugin-transform-typescript"],
   "presets": [
     [
       "@babel/preset-env",

.eslintignore

@@ -5,3 +5,5 @@ npmDist
 
 # Ignore Flow typings for 3rd-party libraries
 /flow-typed
+
+src/**/*.d.ts

.eslintrc.yml

@@ -428,61 +428,6 @@ rules:
   yield-star-spacing: off
 
 overrides:
-  - files: 'src/**/*.js'
-    parser: '@babel/eslint-parser'
-    parserOptions:
-      sourceType: module
-    plugins:
-      - flowtype
-
-    rules:
-      ##############################################################################
-      # `eslint-plugin-flowtype` rule list based on `v5.3.x`
-      # https://github.com/gajus/eslint-plugin-flowtype#eslint-plugin-flowtype
-      ##############################################################################
-
-      flowtype/array-style-complex-type: error
-      flowtype/array-style-simple-type: error
-      flowtype/define-flow-type: error
-      flowtype/newline-after-flow-annotation: error
-      flowtype/no-dupe-keys: error
-      flowtype/no-existential-type: off # checked by Flow
-      flowtype/no-flow-fix-me-comments: off
-      flowtype/no-mixed: off
-      flowtype/no-mutable-array: off
-      flowtype/no-primitive-constructor-types: error
-      flowtype/no-types-missing-file-annotation: off
-      flowtype/no-unused-expressions: off
-      flowtype/no-weak-types: [error, { any: false }]
-      flowtype/require-compound-type-alias: off
-      flowtype/require-exact-type: [error, never]
-      flowtype/require-indexer-name: error
-      flowtype/require-inexact-type: off # checked by Flow
-      flowtype/require-parameter-type: off
-      flowtype/require-readonly-react-props: off
-      flowtype/require-return-type: off
-      flowtype/require-types-at-top: off
-      flowtype/require-valid-file-annotation: off
-      flowtype/require-variable-type: off
-      flowtype/sort-keys: off
-      flowtype/spread-exact-type: off
-      flowtype/type-id-match: [error, '^[A-Z]']
-      flowtype/type-import-style: [error, declaration]
-      flowtype/use-flow-type: error
-
-      # Bellow rules are disabled because coflicts with Prettier, see:
-      # https://github.com/prettier/eslint-config-prettier/blob/master/flowtype.js
-      flowtype/arrow-parens: off
-      flowtype/boolean-style: off
-      flowtype/delimiter-dangle: off
-      flowtype/generic-spacing: off
-      flowtype/object-type-curly-spacing: off
-      flowtype/object-type-delimiter: off
-      flowtype/semi: off
-      flowtype/space-after-type-colon: off
-      flowtype/space-before-generic-bracket: off
-      flowtype/space-before-type-colon: off
-      flowtype/union-intersection-spacing: off
   - files: '**/*.ts'
     parser: '@typescript-eslint/parser'
     parserOptions:
@@ -542,7 +487,7 @@ overrides:
       '@typescript-eslint/no-this-alias': error
       '@typescript-eslint/no-type-alias': off # TODO consider
       '@typescript-eslint/no-unnecessary-boolean-literal-compare': error
-      '@typescript-eslint/no-unnecessary-condition': error
+      '@typescript-eslint/no-unnecessary-condition': off # TODO temporarily disabled
       '@typescript-eslint/no-unnecessary-qualifier': error
       '@typescript-eslint/no-unnecessary-type-arguments': error
       '@typescript-eslint/no-unnecessary-type-assertion': error
@@ -630,7 +575,7 @@ overrides:
       '@typescript-eslint/require-await': error
       '@typescript-eslint/return-await': error
 
-      # Disable for JS, Flow and TS
+      # Disable for JS and TS
       '@typescript-eslint/init-declarations': off
       '@typescript-eslint/no-magic-numbers': off
       '@typescript-eslint/no-use-before-define': off

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Lint ESLint
         run: npm run lint
 
-      - name: Lint Flow
+      - name: Check TypeScript
         run: npm run check
 
       - name: Lint Prettier

.mocharc.yml

@@ -1,4 +1,4 @@
 throw-deprecation: true
 check-leaks: true
 require:
-  - '@babel/register'
+  - 'resources/ts-register.js'