Mark version 5.65.21

Use Object.prototype.hasOwnProperty in copyObj

Note AI code policy in CONTRIBUTING.md

[clike mode] Correct a typo

[kotlin mode]: Fix unsigned long literal token

Mark version 5.65.20

[show-hint addon] Fix incorrectly applied offset

[gas mode] Define text/x-gas mime type

clip-path issue fixed in Chrome 106

Mark version 5.65.19

[sql mode] Support quoted identifier for PostgreSQL

Upgrade actions/cache to v4

[theme demo] Fix dropdown losing choice on solarized light / dark

[pascal mode] Make keywords case-insensitive

[gherkin mode]: Add support for Rule Example keywords