Merge pull request #3229 from Kriechi/py37

Python 3.7 is here

.appveyor.yml

@@ -13,6 +13,8 @@ environment:
       TOXENV: "py36"
       PYINSTALLER: "1"
       WININSTALLER: "1"
+    - PYTHON: "C:\\Python37"
+      TOXENV: "py37"
 
 install:
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"

.travis.yml

@@ -31,8 +31,10 @@ matrix:
         - docker
     - python: 3.6
       env: TOXENV=individual_coverage
-    - python: "3.7-dev"
+    - python: 3.7
       env: TOXENV=py37
+      dist: xenial
+      sudo: true # required workaround for https://github.com/travis-ci/travis-ci/issues/9815
     - language: node_js
       node_js: "node"
       before_install:

setup.py

@@ -36,6 +36,7 @@ setup(
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: Implementation :: CPython",
         "Topic :: Security",
         "Topic :: Internet",