Log Message:
py-hypothesis: update to 3.31.1

3.31.1:

This release improves the handling of deadlines so that they act better with the \ 
shrinking process. This fixes :issue:`892`.

This involves two changes:

1. The deadline is raised during the initial generation and shrinking, and then \ 
lowered to the set value for final replay. This restricts our attention to \ 
examples which exceed the deadline by a more significant margin, which increases \ 
their reliability.

2. When despite the above a test still becomes flaky because it is significantly \ 
faster on rerun than it was on its first run, the error message is now more \ 
explicit about the nature of this problem, and includes both the initial test \ 
run time and the new test run time.

In addition, this release also clarifies the documentation of the deadline \ 
setting slightly to be more explicit about where it applies.