2021-03-17, Version 15.12.0 (Current)

PR-URL: https://github.com/nodejs/node/pull/37766

Notable changes:

* crypto:
  * add optional callback to crypto.sign and crypto.verify (Filip Skokan) https://github.com/nodejs/node/pull/37500
  * support JWK objects in create\*Key (Filip Skokan) https://github.com/nodejs/node/pull/37254
* deps:
  * update to cjs-module-lexer@1.1.0 (Guy Bedford) https://github.com/nodejs/node/pull/37712
  * switch openssl to quictls/openssl (James M Snell) https://github.com/nodejs/node/pull/37601
* fs:
  * improve fsPromises writeFile performance (Nitzan Uziely) https://github.com/nodejs/node/pull/37610
  * improve fsPromises readFile performance (Nitzan Uziely) https://github.com/nodejs/node/pull/37608
* lib:
  * implement AbortSignal.abort() (James M Snell) https://github.com/nodejs/node/pull/37693
* node-api:
  * define version 8 (Gabriel Schulhof) https://github.com/nodejs/node/pull/37652
* worker:
  * add setEnvironmentData/getEnvironmentData (James M Snell) https://github.com/nodejs/node/pull/37486