2020-01-07, Version 12.14.1 'Erbium' (LTS)

Notable changes:

- crypto: fix key requirements in asymmetric cipher (Tobias Nießen)
  https://github.com/nodejs/node/pull/30249
- deps:
    - update llhttp to 2.0.1 (Fedor Indutny)
      https://github.com/nodejs/node/pull/30553
    - update nghttp2 to 1.40.0 (gengjiawen)
      https://github.com/nodejs/node/pull/30493
- v8: mark serdes API as stable (Anna Henningsen)
  https://github.com/nodejs/node/pull/30234

PR-URL: https://github.com/nodejs/node/pull/31069