Add support for Python 3.8

.travis.yml

@@ -30,8 +30,8 @@ jobs:
       cache:
         directories:
           - $HOME/.cache/pre-commit
-    - python: '3.7'
-      env: TOXENV=py37-pytestlatest
+    - python: '3.8'
+      env: TOXENV=py38-pytestlatest
     - python: '2.7'
       env: TOXENV=py27-pytestlatest
 
@@ -43,12 +43,14 @@ jobs:
     - python: "3.6"
       env: TOXENV=py36-pytestlatest
     - python: "3.7"
-      env: TOXENV=py37-pytestmaster
-    - python: "3.7"
-      env: TOXENV=py37-pytestfeatures
+      env: TOXENV=py37-pytestlatest
+    - python: "3.8"
+      env: TOXENV=py38-pytestmaster
+    - python: "3.8"
+      env: TOXENV=py38-pytestfeatures
 
     - stage: deploy
-      python: '3.7'
+      python: '3.8'
       env:
       install: pip install -U setuptools setuptools_scm
       script: skip

appveyor.yml

@@ -5,17 +5,18 @@ environment:
   - TOXENV: "py35-pytestlatest"
   - TOXENV: "py36-pytestlatest"
   - TOXENV: "py37-pytestlatest"
-  - TOXENV: "py37-pytestmaster"
-  - TOXENV: "py37-pytestfeatures"
+  - TOXENV: "py38-pytestlatest"
+  - TOXENV: "py38-pytestmaster"
+  - TOXENV: "py38-pytestfeatures"
 
 install:
-  - C:\Python37\python -m pip install -U pip setuptools
-  - C:\Python37\python -m pip install -U tox setuptools_scm
+  - C:\Python38\python -m pip install -U pip setuptools
+  - C:\Python38\python -m pip install -U tox setuptools_scm
 
 build: false  # Not a C# project, build stuff at the test step instead.
 
 test_script:
-  - C:\Python37\python -m tox
+  - C:\Python38\python -m tox
 
 # We don't deploy anything on tags with AppVeyor, we use Travis instead, so we
 # might as well save resources

setup.py

@@ -46,5 +46,6 @@ setup(
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
     ],
 )

tox.ini

@@ -1,8 +1,8 @@
 [tox]
 envlist=
   linting
-  py{27,34,35,36,37}-pytestlatest
-  py37-pytest{master,features}
+  py{27,34,35,36,37,38}-pytestlatest
+  py38-pytest{master,features}
 
 [testenv]
 passenv = USER USERNAME