2019-04-30, Version 11.15.0 (Current)

Notable changes:

* deps: add s390 asm rules for OpenSSL-1.1.1 (Shigeki Ohtsu) [#19794](https://github.com/nodejs/node/pull/19794)
* src: add .code and SSL specific error properties (Sam Roberts) [#25093](https://github.com/nodejs/node/pull/25093)
* tls:
  * add --tls-min-v1.2 CLI switch (Sam Roberts) [#26951](https://github.com/nodejs/node/pull/26951)
  * supported shared openssl 1.1.0 (Sam Roberts) [#26951](https://github.com/nodejs/node/pull/26951)
  * revert default max toTLSv1.2 (Sam Roberts) [#26951](https://github.com/nodejs/node/pull/26951)
  * revert change to invalid protocol error type (Sam Roberts) [#26951](https://github.com/nodejs/node/pull/26951)
  * support TLSv1.3 (Sam Roberts) [#26209](https://github.com/nodejs/node/pull/26209)
  * add code for ERR\_TLS\_INVALID\_PROTOCOL\_METHOD (Sam Roberts) [#24729](https://github.com/nodejs/node/pull/24729)

PR-URL: https://github.com/nodejs/node/pull/27314