Build phar in CI

.github/workflows/phar.yml

@@ -0,0 +1,37 @@
+name: Compile PHAR
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.4', '8.0']
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@2.13.0
+      with:
+        php-version: ${{ matrix.php-versions }}
+
+    - name: Install dependencies (lib)
+      run: composer install --prefer-dist --no-progress --no-dev --optimize-autoloader --classmap-authoritative
+
+    - name: Install dependencies (phar builder)
+      run: composer install --prefer-dist --no-progress --optimize-autoloader --classmap-authoritative
+      working-directory: tools/phar
+
+    - name: Compile PHAR
+      run: vendor/bin/box compile
+      working-directory: tools/phar
+
+    - name: Ensure PHAR is OK
+      run: build/jolitypo.phar fr_FR README.md
+      working-directory: tools/phar