Convert Bit javascript from Flow to TypeScript (#119)

* rename all files from .js to .ts

* configure babel to compile typescript

* fix all typescript syntax errors

* reconfigure eslint to work with typescript

* fix many lint errors

*  automatically add @ts-ignore for all tsc errors

* add lint and check_types scripts for the bit-bin CI to run

.eslintrc.js

@@ -0,0 +1,76 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: './tsconfig.json'
+  },
+  extends: [
+    'airbnb-typescript/base',
+    // 'plugin:@typescript-eslint/recommended-requiring-type-checking',
+    'plugin:@typescript-eslint/recommended',
+    // 'plugin:eslint-comments/recommended',
+    'plugin:promise/recommended',
+    // 'plugin:unicorn/recommended',
+    // 'plugin:mocha/recommended',
+    'prettier',
+    'prettier/@typescript-eslint'
+  ],
+  plugins: [
+    '@typescript-eslint',
+    // 'eslint-comments',
+    'promise'
+    // 'mocha',
+    // 'unicorn'
+  ],
+  rules: {
+    '@typescript-eslint/no-use-before-define': [
+      'error',
+      { functions: false, classes: true, variables: true, typedefs: true }
+    ],
+
+    // ERRORS OF plugin:@typescript-eslint/recommended
+    '@typescript-eslint/no-var-requires': 'off',
+    '@typescript-eslint/ban-ts-ignore': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+    // END ERRORS OF plugin:@typescript-eslint/recommended
+
+    // ERRORS OF 'plugin:promise/recommended'
+    'promise/always-return': 'off',
+    'promise/no-nesting': 'off',
+    // END ERRORS OF 'plugin:promise/recommended'
+
+    'import/export': 'off', // typescript does allow multiple export default when overloading. not sure why it's enabled here. rule source: https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/export.md
+    'prefer-object-spread': 'off',
+    'import/no-duplicates': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    'import/no-cycle': 'off',
+    'import/no-useless-path-segments': 'off',
+    'lines-between-class-members': 'off',
+    radix: 'off',
+    'no-underscore-dangle': 'off',
+    'no-param-reassign': 'off',
+    'no-return-assign': [0, 'except-parens'],
+    'class-methods-use-this': 'off',
+    'prefer-destructuring': 'off',
+    'import/no-extraneous-dependencies': 'off',
+    'no-restricted-syntax': [2, 'ForInStatement', 'LabeledStatement', 'WithStatement'],
+    'no-unused-expressions': 'off',
+    'max-len': [
+      2,
+      120,
+      2,
+      {
+        ignoreUrls: true,
+        ignoreComments: true,
+        ignoreRegExpLiterals: true,
+        ignoreStrings: true,
+        ignoreTemplateLiterals: true
+      }
+    ],
+    'max-lines': [2, 1700],
+    'func-names': [0]
+  },
+  env: {
+    node: true,
+    mocha: true
+  }
+};

.prettierrc

@@ -1,6 +1,6 @@
 {
   "printWidth": 120,
-  "parser": "flow",
+  "parser": "typescript",
   "singleQuote": true,
   "tabWidth": 2,
   "useTabs": false,

babel-register.js

@@ -0,0 +1 @@
+require('@babel/register')({ extensions: ['.js', '.jsx', '.ts', '.tsx'] });

babel.config.js

@@ -0,0 +1,40 @@
+module.exports = function (api) {
+  api.cache(true);
+
+  const presets = [
+    '@babel/typescript',
+    [
+      '@babel/preset-env',
+      {
+        targets: {
+          node: 8
+        }
+      }
+    ]
+  ];
+  const plugins = [
+    [
+      '@babel/plugin-transform-modules-commonjs',
+      {
+        lazy: () => true
+      }
+    ],
+    ['@babel/plugin-transform-runtime'],
+    ['@babel/plugin-proposal-object-rest-spread'],
+    ['@babel/plugin-proposal-class-properties'],
+    [
+      '@babel/plugin-transform-async-to-generator',
+      {
+        module: 'bluebird',
+        method: 'coroutine'
+      }
+    ]
+  ];
+
+  return {
+    presets,
+    plugins,
+    only: ['**/*.ts'],
+    ignore: ['components/*']
+  };
+};