V3 dev (AstroDraw#46)

* move bundling infra to webpack. 
* add typescript
* add Jest. migrate utils test
* add tslint
* remove grunt. bump version
* added eslint.
* export AspectCalculator.

Author: afucher

.eslintignore

@@ -0,0 +1,3 @@
+node_modules
+dist
+*.test.ts

.eslintrc.js

@@ -0,0 +1,67 @@
+module.exports = {
+  'env': {
+    'browser': true,
+    'commonjs': true,
+    'es6': true
+  },
+  'extends': [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/eslint-recommended'
+  ],
+  'globals': {
+    'Atomics': 'readonly',
+    'SharedArrayBuffer': 'readonly'
+  },
+  'parser': '@typescript-eslint/parser',
+  'parserOptions': {
+    'sourceType': 'module',
+    'ecmaVersion': 2018
+  },
+  'plugins': [
+    '@typescript-eslint'
+  ],
+  'rules': {
+    'indent': [
+      'error',
+      2,
+      { 'SwitchCase': 1 }
+    ],
+    'linebreak-style': [
+      'error',
+      'unix'
+    ],
+    'quotes': [
+      'error',
+      'single',
+      { 'allowTemplateLiterals': true }
+    ],
+    'semi': [
+      'error',
+      'never'
+    ],
+    'no-var': ['error'],
+    '@typescript-eslint/member-delimiter-style': [
+      'error',
+      {
+        'multiline': {
+          'delimiter': 'none',
+          'requireLast': true
+        },
+        'singleline': {
+          'delimiter': 'semi',
+          'requireLast': false
+        }
+      }
+    ],
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/no-unused-vars': ['warn', { 'vars': 'all', 'args': 'after-used', 'ignoreRestSiblings': false }],
+    'no-unused-vars': 'off',
+    '@typescript-eslint/restrict-plus-operands': 'off',
+    //'@typescript-eslint/no-unused-vars': 'off',
+    '@typescript-eslint/prefer-optional-chain': 'off',
+    '@typescript-eslint/naming-convention': 'off',
+    '@typescript-eslint/strict-boolean-expressions': 'off',
+    '@typescript-eslint/prefer-nullish-coalescing': 'off',
+    'no-prototype-builtins': 'off'
+  },
+}

.gitignore

@@ -3,5 +3,6 @@
 .project
 .DS_Store
 build/
+coverage/