Add CI

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build-and-test:
+    runs-on: ${{ matrix.ubuntu }}
+    strategy:
+      matrix:
+        ubuntu: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
+
+    steps:
+      - name: Checkout php-gnupg
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gpg gpgme gpgsm libgpgme-dev php-cli php-dev autoconf automake libtool make gcc
+
+      - name: Build and install php-gnupg
+        run: |
+          phpize
+          ./configure
+          make
+          sudo make install
+
+      - name: Run tests
+        run: |
+          make test