Run CI on Node 20 and 12

.github/workflows/main.yml

@@ -3,13 +3,19 @@ on:
   - push
   - pull_request
 jobs:
-  build:
+  test:
+    name: Node.js ${{ matrix.node-version }}
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 20
+          - 12
     steps:
-    - uses: actions/checkout@v4
-    - name: Use Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: '22.x'
-    - run: npm ci
-    - run: npm test
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm test

README.md

@@ -1,7 +1,10 @@
+<div align="center">
+
 <a href="https://github.com/slevithan/regex#readme"><img src="https://github.com/slevithan/regex/raw/main/regex-logo.svg" height="130" alt="regex logo"></a>
 
 [![Build Status](https://github.com/slevithan/regex/workflows/CI/badge.svg)](https://github.com/slevithan/regex/actions)
 [![Bundle Size](https://deno.bundlejs.com/badge?q=regex&treeshake=[*])](https://bundlejs.com/?q=regex&treeshake=[*])
+</div>
 
 `regex` creates **readable, high performance, *native* JavaScript regular expressions** with advanced features and best practices built-in. It's lightweight and supports all ES2024+ regex functionality. It can also be used dependency-free as a [Babel plugin](https://github.com/slevithan/babel-plugin-transform-regex).