2020-06-02, Version 12.18.0 'Erbium' (LTS)

This is a security release.

Notable changes:

Vulnerabilities fixed:
CVE-2020-8172: TLS session reuse can lead to host certificate verification bypass (High).
CVE-2020-11080: HTTP/2 Large Settings Frame DoS (Low).
CVE-2020-8174: `napi_get_value_string_*()` allows various kinds of memory corruption (High).

PR-URL: https://github.com/nodejs-private/node-private/pull/213