Increase minimum Node.js version to 16

[legobeat]

• BREAKING: Drop support for major Node.js versions 14,15,17,19.
• Update CI matrix to run on supported major node versions
  • Why 20.5?: [v20.6] CJS runs repeatedly when there are circular dependencies when loaded by ESM nodejs/node#49497
• Change recommended Node.js version from v14 to v15

Blocked by

• deps: bump ethereum-cryptography, @ethereumjs/util #330
• 6.0.1 #331

Blocking

• deps: @metamask/utils@^5.0.2->^8.1.0 #333
  • 7.0.0 #335

[socket-security]

Updated dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@types/node	18.7.6...16.18.50	None	+0/-0	3.47 MB	types

[socket-security]

👍 Dependency issues cleared. Learn more about Socket for GitHub ↗︎

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

[legobeat]

@SocketSecurity ignore @types/[email protected]
@SocketSecurity ignore [email protected]

unmaintained ok