added test-coverage to make

Author: Alexsey-VR

Makefile

@@ -8,4 +8,7 @@ lint:
 	composer exec --verbose phpcs -- --standard=PSR12 src bin
 
 test:
-	XDEBUG_MODE=coverage composer exec --verbose phpunit tests -- --coverage-html ./reports
+	composer exec --verbose phpunit tests
+
+test-coverage:
+    XDEBUG_MODE=coverage composer exec --verbose phpunit tests -- --coverage-html ./reports