v18.3.0
DevTools bugfix: Ignore duplicate welcome "message" events (#24186)
Revert logic for checking for duplicate installations of DevTools (#22638)
DevTools should inject itself for XHTML pages too (not just HTML) (#22932)
[DevTools] only polyfill requestAnimationFrame when necessary (#24651)
Enable prefer-const lint rules (#18451)
Fix spelling errors and typos (#19138)
DevTools: Include Edge in browser name detection (#22584)