ast: Adding rule_head_refs capabilities feature flag (#6346)

To signal/toggle support for general refs in rule heads.

Fixes: #6334
Signed-off-by: Johan Fylling <johan.dev@fylling.se>

Johan Fylling committed 2y ago

56f2350d0f6820db2a68ef5e69ce72dd16481278

Parent: 7933a40

Committed by GitHub <noreply@github.com> on 11/15/2023, 10:24:16 AM