2021-01-14, Version 15.6.0 (Current)

PR-URL: https://github.com/nodejs/node/pull/36889

Notable changes:

* child_process:
  * add 'overlapped' stdio flag (Thiago Padilha) (https://github.com/nodejs/node/pull/29412)
  * support AbortSignal in fork (Benjamin Gruenbaum) (https://github.com/nodejs/node/pull/36603)
* crypto:
  * implement basic secure heap support (James M Snell) (https://github.com/nodejs/node/pull/36779)
  * fixup bug in keygen error handling (James M Snell) (https://github.com/nodejs/node/pull/36779)
  * introduce X509Certificate API (James M Snell) (https://github.com/nodejs/node/pull/36804)
  * implement randomuuid (James M Snell) (https://github.com/nodejs/node/pull/36729)
* doc:
  * update release key for Danielle Adams (Danielle Adams) (https://github.com/nodejs/node/pull/36793)
  * add dnlup to collaborators (Daniele Belardi) (https://github.com/nodejs/node/pull/36849)
  * add panva to collaborators (Filip Skokan) (https://github.com/nodejs/node/pull/36802)
  * add yashLadha to colla...