Add CI check ensuring interfaces have return types

Author: wouterj

Data/Bundle/Compiler/BundleCompilerInterface.php

@@ -23,6 +23,8 @@ interface BundleCompilerInterface
     /**
      * Compiles a resource bundle at the given source to the given target
      * directory.
+     *
+     * @return void
      */
     public function compile(string $sourcePath, string $targetDir);
 }

Data/Bundle/Writer/BundleWriterInterface.php

@@ -20,5 +20,8 @@
  */
 interface BundleWriterInterface
 {
+    /**
+     * @return void
+     */
     public function write(string $path, string $locale, mixed $data);
 }