Run continuous integration on GitHub Actions (#4)

.github/workflows/main.yml

@@ -0,0 +1,63 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run build
+        run: npm run build
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run linter
+        run: npm run lint
+
+  test:
+    name: Test on Node.js ${{ matrix.node }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [6, 8, 10, 12, 14, 16, 18, 20, 22]
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm run unit

.npmignore

@@ -1,3 +1,3 @@
-.travis.yml
+.github/
 bench/
 test/

README.md

@@ -4,7 +4,7 @@
 
 `base64-js` does basic base64 encoding/decoding in pure JS.
 
-[![build status](https://secure.travis-ci.org/beatgammit/base64-js.png)](http://travis-ci.org/beatgammit/base64-js)
+[![CI](https://github.com/feross/base64-js/actions/workflows/main.yml/badge.svg)](https://github.com/feross/base64-js/actions/workflows/main.yml)
 
 Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-purpose binary data.