add EOF

Author: mununki

tests/ppx/react/externalWithRef.res

@@ -26,4 +26,4 @@ module V4C = {
       ~x: string,
       ~ref: ReactDOM.Ref.currentDomRef=?,
     ) => React.element = "component"
-}
+}

tests/ppx/react/externalWithTypeVariables.res

@@ -26,4 +26,4 @@ module V4C = {
       ~x: t<'a>,
       ~children: React.element,
     ) => React.element = "component"
-}
+}