feat: move to typescript/ESM (#1)

This migrates to typescript and does the following:

- Adds support for ESM
- Adds prettier
- Adds google eslint config
- Bumps node CI versions
- Replaces testing with node built-ins

.editorconfig

@@ -0,0 +1,7 @@
+root = true
+
+[*]
+end_of_line = lf
+indent_size = 2
+indent_style = space
+trim_trailing_whitespace = true

.eslintrc.json

@@ -0,0 +1,40 @@
+{
+  "extends": [
+    "eslint:recommended",
+    "google",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "indent": "off",
+    "quote-props": "off",
+    "max-len": "error",
+    "eqeqeq": "error",
+    "no-unused-vars": "off",
+    "spaced-comment": "off",
+    "operator-linebreak": "off",
+    "comma-dangle": [
+      "error",
+      "never"
+    ],
+    "quotes": [
+      "error",
+      "single",
+      {
+        "avoidEscape": true,
+        "allowTemplateLiterals": true
+      }
+    ],
+    "@typescript-eslint/explicit-function-return-type": [
+      "error",
+      {
+        "allowExpressions": true
+      }
+    ],
+    "@typescript-eslint/explicit-member-accessibility": "error",
+    "@typescript-eslint/member-delimiter-style": "error",
+    "@typescript-eslint/no-array-constructor": "error",
+    "@typescript-eslint/no-explicit-any": "error",
+    "@typescript-eslint/parameter-properties": "error",
+    "@typescript-eslint/no-inferrable-types": "off"
+  }
+}

.github/workflows/ci.yml

@@ -8,16 +8,16 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [4.x, 6.x, 8.x, 9.x, 10.x, 12.x, 14.x, 16.x, 18.x, 19.x]
+        node-version: [16.x, 18.x, 19.x, 20.x]
 
     steps:
     - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm install
-    - run: npm run tests-only
+    - run: npm ci
+    - run: npm run build && npm test
 
   lint:
     runs-on: ubuntu-latest
@@ -28,5 +28,5 @@ jobs:
       uses: actions/setup-node@v3
       with:
         node-version: lts/*
-    - run: npm install
+    - run: npm ci
     - run: npm run lint

.gitignore

@@ -1,27 +1,3 @@
-# Logs
-logs
-*.log
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directory
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
-node_modules
+/node_modules
+/lib
+*.swp

.prettierrc.json

@@ -0,0 +1,10 @@
+{
+  "bracketSpacing": false,
+  "printWidth": 80,
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "none",
+  "useTabs": false,
+  "arrowParens": "always"
+}