Reverse order of arguments for ap

[travisbrown]

This is a follow-up to #821 that rebases @lukewyman's changes, makes some fixes supported by the new version of Simulacrum, and updates the docs.

Note that I've renamed ap on CartesianBuilderN to apWith to avoid confusion (since the function comes after the arguments in that case).

[non]

Seems reasonable to me. 👍

[ceedubs]

Looks good. 👍 as long as the build passes.

[codecov-io]

Current coverage is 89.26%

Merging #833 into master will decrease coverage by -0.04% as of 989178b

@@            master    #833   diff @@
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  Files          168     168       
  Stmts         2319    2319       
  Branches        75      75       
  Methods          0       0       
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- Hit           2071    2070     -1
  Partial          0       0       
- Missed         248     249     +1

Review entire Coverage Diff as of 989178b

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