> What is this pull request for?

I didn't notice so many PR without useful commit message (PR description). Not sure that it's useful.

> Include version updates if necessary.

I don't understand this part.

> Make sure you have signed the CLA agreement before continuing

We have a bot for that and the bot explains how to sign it, no?


> ### Reason to modify

I never saw such template in any other project. I'm not sure that we must require an exact format for new PR.


> ### Tests and reviews
> I have tested the code and it works.

While I run Linux and have Windows and FreeBSD VM, sometimes I'm lazy and rely on the CI. I consider that it's waste to burn CI CPUs sometimes :-) For example, it's not that easy to test a change specific to Windows on Python 2.7, but AppVeyor now runs tests for you!

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@Jensen: I feel that you have useful hints for new contributors, but I suggest you to enhance the devguide instead of using a template.