add github actions

Author: atomicptr

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        luaVersion:
+          - "5.2"
+          - "5.3"
+          - "5.4"
+          - "luajit-2.1"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: leafo/gh-actions-lua@v12
+        with:
+          luaVersion: ${{ matrix.luaVersion }}
+      - uses: leafo/gh-actions-luarocks@v6
+      - name: Install busted
+        run: luarocks install busted
+      - name: Run tests
+        run: busted -p _test .