add memoizedResultFunc to output selector interface

[mondomishi]

Exposes the memoizedResultFunc on the output selector so that (for example) you can access the cache (for example to clear it) when using lodash.memoize as is done in this example.

I see that #220 exists, but it renames the exposed field to memoize which is rather misleading. Also, it hasn't been touched for a while, so i dont know what the status is there.

[codecov-io]

Codecov Report

Merging #358 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #358   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          15     15           
=====================================
  Hits           15     15

Impacted Files	Coverage Δ
src/index.js	100% <ø> (ø)	⬆️

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[mondomishi]

howdy @mnorrish I was hoping you could take a look at this (since you stamped #220)

My thought is that we should land this, and cancel #220.

Let me know what you think / if there is somebody else we can direct this too :)

[mondomishi]

howdy @ellbee I was hoping you could merge this (I didn't realize this repo has write access restrictions).

Let me know what you think / if there is somebody else I can direct this to :)

[markerikson]

Superseded by #514 .