Add support for Python 3.7

[layday]

No description provided.

[codecov]

Codecov Report

Merging #216 into master will decrease coverage by 0.15%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #216      +/-   ##
==========================================
- Coverage     100%   99.84%   -0.16%     
==========================================
  Files          11       11              
  Lines        1281     1285       +4     
  Branches      235      235              
==========================================
+ Hits         1281     1283       +2     
- Misses          0        2       +2

[layday]

Build only failing cuz of the Trafaret benchmark.

[layday]

By the way this only tests against 3.7.0a4 (same as nightly) since the Travis folks haven't been able to build later releases.

[samuelcolvin]

thanks a lot, could you add a line to HISTORY.rst. (I think you might have to start a new section).

We should disable the trafaret tests on 3.7, but I'll do that separately.

[layday]

Done that now. Want me to squash the commits?

[samuelcolvin]

No need, I'll squash when I merge.

However could you mark 3.7-dev as allowed to fail until we resolve the problem with benchmarks.

[layday]

It might make more sense to remove 3.7-dev seeing as it points to the same version as nightly.

[samuelcolvin]

Ok

[layday]

Done!

[samuelcolvin]

Thanks