0.3.7: Result binding simplification (#3)

* Overhauled update. Nested match fix.

* Compare against undefined

I'm pretty sure (based on the error text) this is what you meant
putting a bang in there converts to boolean which will never be undefined

* Clarify double assignment

* A null result is not a match

I want to be able to call this on the result of firstMatch(...) which is null

* Two pending tests

* Lint

and added a 'fix' script to run tsline with --fix

* Updateable -> Updatable