Update dependency tslint to version 5.4.3

[renovate]

This Pull Request updates dependency tslint from version 5.4.2 to 5.4.3

Changelog

5.4.3 / 2017-06-06

• Print stack trace of exceptions (#2890)
• Ensure compatibility with older typescript in CI (#2893)
• binary-expression-operand-order: Allow both sides to be literals (#2873)
• unified-signatures: Can't unify rest parameters (#2874)
• no-string-literal: Fix documentation (#2875)
• Update tslint dependency (#2851)
  Don't type-check while linting.
  We can now use `allow-boolean-or-undefined` option of `strict-boolean-expressions`. This commit removes some explicit comparison to `true`.
• Only set exitCode instead of exiting immediately (#2867)