client: secure now defaults to true (fixes #394)

[FoseFx]

@Meerkov proposed this change in #395 but that PR went stale
I changed the commit message as requested

Closes #395
Fixes #394

[AlcaDesign]

I would prefer to set secure to true by default only if the server and port options are also default values. This would need to be checked within client.prototype.connect.

[FoseFx]

@AlcaDesign change made

[Meerkov]

Doesn't that mean that if you set the port to 443, it would default to insecure again?

Users should have to go out of their way to turn off security.

[FoseFx]

Connect() will set secure to true when the port is 443 https://github.com/tmijs/tmi.js/blob/df228dc818dbfe203bf85d19c54e7be1e6177077/lib/client.js#L1061-L1063