Fix breaking typescript@next tests

[jkillian]

Bug Report

• TSLint version:
• TypeScript version:
• Running TSLint via: (pick one) CLI / Node.js API / VSCode / grunt-tslint / Atom / Visual Studio / etc

microsoft/TypeScript#24142 is the cause of one of the issues, we should wait for a response there, hopefully a new nightly version of TS will resolve this issue.

Another test failure was caused by a new diagnostic which marks when all destructured elements are unused. We'll likely need to make a code change to handle this:

[jkillian]

Update: microsoft/TypeScript#24142 has been fixed, so after the next nightly is released we should see some of the issues resolve themselves. This just means we'll need to appropriately handle the new diagnostics noted above

[johnwiseheart]

I'm pretty sure theyre fixed now