chore: add workflows

.busted

@@ -0,0 +1,6 @@
+return {
+  default = {
+    verbose = true,
+    output = "gtest",
+  },
+}

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI pipeline
+
+on:
+  pull_request: {}
+  push:
+    branches:
+    - main
+
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        luaVersion: [ "5.2", "5.3", "5.4", "luajit-2.1.0-beta3", "luajit-openresty" ]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: leafo/gh-actions-lua@v8
+        with:
+          luaVersion: ${{ matrix.luaVersion }}
+
+      - uses: leafo/gh-actions-luarocks@v4
+
+      - name: install dependencies
+        run: |
+          luarocks install busted
+          luarocks install luacov-coveralls
+
+      - name: build luarocks
+        run: |
+          make build
+
+      - name: run tests
+        run: |
+          busted --coverage

.github/workflows/luacheck.yml

@@ -0,0 +1,16 @@
+name: Luacheck
+
+on:
+  pull_request: {}
+  push:
+    branches:
+      - main
+
+jobs:
+  luacheck:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Luacheck
+        uses: lunarmodules/luacheck@v1

.luacheckrc

@@ -0,0 +1 @@
+unused_args     = false