Enable modernize-use-override

.clang-tidy

@@ -30,7 +30,7 @@ Checks: '-*,
   modernize-shrink-to-fit,
   modernize-use-bool-literals,
   modernize-use-nullptr,
-  -modernize-use-override,
+  modernize-use-override,
   readability-container-size-empty,
   readability-deleted-default,
   readability-function-size,