Run patch-package only on development (test+publish)

[iglosiggio]

I'm not sure this is the correct fix (don't have the setup to do js development here) but it looks like a viable direction.

This should help with #2967 #2968 #2969 #2970 #2971

[coveralls]

Coverage remained the same at 95.024% when pulling becb32a on iglosiggio:patch-1 into 66ee70d on jashkenas:master.

[jgonggrijp]

Thanks for the patch and sorry for the trouble I have caused. I'm going to hotfix this first by simply throwing the postinstall script out of the package.json; I'm not sure what is the right place to run patch-package yet, but it is not required for end users in any case.

[jgonggrijp]

I chose a slightly different, but similar approach: run it before building the annotated sources, rather than before running the tests. That's because the patched package is docco, which we use for the annotated sources. Thanks again for the fast action!

[jgonggrijp]

(Oh, and also #2974 was merged first by @jashkenas, while I was doing the same thing locally.)

[iglosiggio]

I chose a slightly different, but similar approach: run it before building the annotated sources, rather than before running the tests. That's because the patched package is docco, which we use for the annotated sources. Thanks again for the fast action!

Thank you for your swift resolution of the issue! <3