v0.21.0

Qwik version: ^1.4.3

What's new
Automatic removal of unused keys: https://github.com/robisim74/qwik-speak/blob/main/docs/extract.md#automatic-removal-of-unused-keys

• Update Qwik to 1.4.3 & docs 5dba63f
• Feat(extract): unused keys b2d9703
• Tools(extract): fix removed keys 6efa4ca
• fix isExistingKey 25eba4f Thanks to @genox

v0.20.1...v0.21.0