various tox cleanups

[wsanchez]

This does a number of things:

• Displays coverage output for uncovered code when you run a coverage-* environment
• Orders tests so that more recent Python and Twisted versions tend to run first.
• Adds a mypy environment, not yet enabled in the envlist (or Travis).

[codecov]

Codecov Report

Merging #182 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #182      +/-   ##
==========================================
- Coverage   95.89%   95.88%   -0.01%     
==========================================
  Files          12       12              
  Lines        1558     1532      -26     
  Branches       86       87       +1     
==========================================
- Hits         1494     1469      -25     
  Misses         52       52              
+ Partials       12       11       -1

Impacted Files	Coverage Δ
src/klein/test/py3_test_resource.py	96% <ø> (ø)	⬆️
src/klein/resource.py	91.24% <0%> (-0.07%)	⬇️
src/klein/__init__.py	100% <0%> (ø)	⬆️
src/klein/test/test_resource.py	96.91% <0%> (+0.01%)	⬆️
src/klein/app.py	98.6% <0%> (+0.04%)	⬆️

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[wsanchez]

OK, ready for review.

[wsanchez]

OK this is ready for review

[wsanchez]

Gonna make this more bite-sized. Subtasks:

• ✔︎ Install a modern pypy. #183: Update pypy
• ✔︎ Remove Py3.3 support #184: Drop Python 3.3
• ✔︎ Drop support for Twisted<15.5 #185: Drop Twisted < 15.5
• ☐ Clean up coverage generation and reporting in tox & travis. #187: Clean up coverage generation and reporting

[dpnova]

Are you using mypy with klein @wsanchez ? How do you find it if so?

[wsanchez]

#187 is the last part of this, so closing this in favor of that.

[wsanchez]

@dpnova: Yes, I am, and I think it's got some flaws but is way better than not having it. The mypy tox environment just got merged to master, FYI.

[dpnova]

Thanks!