Implement GitHub Actions w/ codecov reports

.eslintignore

@@ -0,0 +1 @@
+.prettierignore

.github/workflows/ci.yml

@@ -0,0 +1,72 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - next
+  pull_request:
+
+jobs:
+  lint:
+    name: Quality checks
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Security audit
+        run: npm audit
+
+      - name: Code coverage
+        run: npx nyc --reporter=lcovonly npm test
+
+      - uses: codecov/codecov-action@v1
+        with:
+          files: ./coverage/lcov.info
+          fail_ci_if_error: true
+
+      - name: Lint
+        run: npx eslint .
+
+      - name: Check formatting
+        run: npx prettier . --check
+
+  test:
+    name: Test - ${{ matrix.os }} - Node v${{ matrix.node-version }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        node-version: [10.x, 12.x, 14.x]
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Set up Git
+        if: matrix.os == 'windows-latest'
+        run: git config --global core.autocrlf input
+
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test

.gitignore

@@ -8,16 +8,11 @@ pids
 *.seed
 
 # Coverage directory used by tools like istanbul
+.nyc_output/
 coverage/
 
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# Dependency directory
-# Commenting this out is preferred by some people, see
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git-
+# Dependencies
 node_modules/
 
-# Users Environment Variables
-.lock-wscript
+# IDEs
 .idea

.prettierignore

@@ -0,0 +1,14 @@
+# Coverage directory used by tools like istanbul
+.nyc_output/
+coverage/
+
+# Dependencies
+node_modules/
+package-lock.json
+
+# JSON configuration files
+.eslintrc
+
+# IDEs
+.idea/
+.vscode/