Enable Wasm BigInt. This enables WASM_BIGINT while maintaining (hypothetical) Safari 14 support
by shimming BigInt64Array and BigUint64Array if they are missing. I think the
last time we tried to enable WASM_BIGINT was before #2019 so our chances
are significantly better this time.

This will fix dynamic linking bugs, reduce code size, and improve speed.

See also my upstream PR:
https://github.com/emscripten-core/emscripten/pull/17103

- [x] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry

package:
  name: regex
  version: 2022.3.15
source:
  sha256: 0a7b75cc7bb4cc0334380053e4671c560e31272c9d2d5a6c4b8e9ae2c9bd0f82
  url: https://files.pythonhosted.org/packages/0c/06/8d851419ff870cbe2bf65ecdcfda59d80f11f41157392d794ee544f15bf6/regex-2022.3.15.tar.gz
test:
  imports:
    - regex

package:
  name: regex
  version: 2022.3.15
source:
  sha256: 0a7b75cc7bb4cc0334380053e4671c560e31272c9d2d5a6c4b8e9ae2c9bd0f82
  url: https://files.pythonhosted.org/packages/0c/06/8d851419ff870cbe2bf65ecdcfda59d80f11f41157392d794ee544f15bf6/regex-2022.3.15.tar.gz
test:
  imports:
    - regex
