Automatically remove 'past' and 'future' history from redux-undo

[ndbroadbent]

See: #95, and https://github.com/captbaritone/raven-for-redux/pull/95#issuecomment-429611599

The past and present arrays include full copies of the state whenever a user makes a change. It's not a problem in the browser because they share the same memory references, but it's a huge problem when you need to serialize that data. This library is already specific to redux, and redux-undo is the most common way of adding undo/redo functionality to a React/Redux application. So maybe this makes sense as a good default. Otherwise most redux-undo users will end up with 413 responses, or no state at all (when using the code in this PR (#95).)

[codecov-io]

Codecov Report

Merging #96 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #96   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          26     45   +19     
  Branches       10     21   +11     
=====================================
+ Hits           26     45   +19

Impacted Files	Coverage Δ
index.js	100% <100%> (ø)	:arrow_up:

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[captbaritone]

Cool! I don’t think this deserves to be in the core library, but I appreciate that you took the time to post it so others could find it.

Maybe we could make the example directory into an examples directory with a few sub directories. Then you could include this as an example project. What do you think?

[captbaritone]

I'll close this for now. Feel free to reply if you think it should be reopened.