style: remove semicolons
config: remove version changer for cat feature flag
docs: correct release notes
express: ensure that apps are at the top of stack when 'mount' is emitted
config: add support for labels
Revert "config: add support for labels"

This reverts commit 59b0d6d4d10e4f61ef403deb52740d28b08bf63e.
cat: added nr.apdexPerfZone and cleaned up some other related code.
config: make app_name more permissive
docs: updated for new version
release: published 1.12.0