Merge pull request #13 from jaredsburrows/jb/update-dependencies/03-14-18

update gradle to 4.6

update rxjava to 2.1.10

update coroutines to 0.22.5

update kotlint to 1.2.30

Remove advanced debugging code that was left in.

Rename One to Task.

Expose cancelation via boolean return value.

Eliminate Maybe and Task.

Remove progression factories as they're all iterables.

Kotlin 1.2.20.

Add rudimentary converter for RxJS 6.

Strip remaining usages of the 'Many' type name.

Ensure normal cancelation doesn't crash the interop.

Kotlin 1.2.20 EAP 71.