test: custom port

[joshgav]

• adds a test for a custom port specified with --port
• use --inspect-brk instead of --debug-brk
• fixes regex for default port to consider --inspect=<port> and --inspect-brk=<port> as well as --inspect-port=<port>, since all of these are supported per src/node_debug_options.cc.
• look for 'Debugger listening on..." rather than chrome-devtools for better future-proofness.

[hybrist]

[hybrist]

CI: https://ci.nodejs.org/job/node-inspect-continuous-integration/24/

[hybrist]

Ugh, CI doesn't pass because the bad test is still around: #36

Could you have a quick look at that PR and then rebase once it's merged?

[hybrist]

Rebased version here: #41

[joshgav]

Thanks and sorry for my delay in picking it back up!

[hybrist]

No worries. I was just "stealing" the commit because I want to do another dep pull later this week & wanted to make sure that it's included.