v0.21.4

Bug fixes

• Support windows format path (#2262) (#2279) (098d8b4)
• Properly handle override keyword in multilevel inherit (#2449) (cfb4616)
• Fix internal setter signature caching (#2521) (5ab63fa)
• Use proper portable copysign polyfill (#2490) (5e17892)
• Fix shadowstack pass discard debuginfo (#2496) (f9dee72)
• Remove leftover process streams (#2519) (e3dbefa)

Other

• Add more test coverage for binary expressions (#2515) (bf3bf34)
• Use matching filename in tokenizer test (#2513) (078a4d0)
• Update Binaryen (#2493) (d32ef08)
• Add optional test coverage reports (#2517) (4801750)
• Improve math tests by using Object.is for -0.0 checks (#2504) (99b7196)
• Update v8-canary version in CI (#2500) (e5fb10b)