Change return type to more specific implementation

[snapshotpl]

    ---------- begin diff ----------
--- Original
+++ New
@@ -45,7 +45,7 @@
     /**
      * @param string|UriInterface|int|null $value
      */
-    public function convertToPHPValue($value, AbstractPlatform $platform): ?UriInterface
+    public function convertToPHPValue($value, AbstractPlatform $platform): ?UriImplementation
     {
         if (\is_string($value)) {
             return new UriImplementation($value);
    ----------- end diff -----------
Applied rules:
 * Rector\TypeDeclaration\Rector\FunctionLike\ReturnTypeDeclarationRector

Where UriImplementation implements UriInterface. I would expects that I can mark return type as abstraction.