Update special-handling queries for import-grammars

[mylinhdao]

Sometime, we use special-handling queries instead of generated queries to cover syntaxes without dedicated node-types. But if the grammars change, we need to update these queries, too.
An example for a special-handling query is:
(enum_specifier body: (enumerator_list)) @enum_definition
If one of the node types (enum_specifier or enumerator_list) is deleted or modified, we must be informed about this query.

[ChristianHuehn]

Is there anyway we could auto detect changes to it? And for example update them automatically or at least get a notification?