Add codecov

Author: kitar

.github/workflows/php.yml

@@ -17,4 +17,6 @@ jobs:
       run: composer install --prefer-dist --no-progress --no-suggest
 
     - name: Run test suite
-      run: composer run-script test
+      run: composer run-script ci-test
+
+    - uses: codecov/codecov-action@v1

composer.json

@@ -16,7 +16,8 @@
     ],
     "license": "MIT",
     "scripts": {
-        "test": "vendor/bin/phpunit"
+        "test": "vendor/bin/phpunit",
+        "ci-test": "vendor/bin/phpunit --coverage-clover coverage.xml"
     },
     "require": {
         "illuminate/support": "^6.0",