chang js codebase to typescript (#49)

.circleci/config.yml

@@ -7,7 +7,7 @@ jobs:
   build:
     docker:
       # specify the version you desire here
-      - image: circleci/node:10.16.0
+      - image: circleci/node:14
 
       # Specify service dependencies here if necessary
       # CircleCI maintains a library of pre-built images

.eslintrc.js

@@ -0,0 +1,14 @@
+module.exports = {
+  env: {
+    mocha: true
+  },
+  extends: 'standard-with-typescript',
+  ignorePatterns: ['dist/*'],
+  parserOptions: {
+    ecmaVersion: 2020,
+    project: './tsconfig.test.json'
+  },
+  rules: {
+    '@typescript-eslint/consistent-type-definitions': ['error', 'type']
+  }
+}

.github/workflows/nodejs.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x]
+        node-version: [12.x, 14.x]
 
     steps:
     - uses: actions/checkout@v1
@@ -20,6 +20,7 @@ jobs:
     - name: npm install, build, and test
       run: |
         npm ci
+        npm run lint
         npm run test
       env:
         CI: true

.gitignore

@@ -63,3 +63,4 @@ typings/
 .node-version
 
 types
+dist

.mocharc.json

@@ -0,0 +1,5 @@
+{
+  "extension": ["js", "ts"],
+  "spec": "test/**/*",
+  "require": "ts-node/register"
+}