update CI job matrix

.travis.yml

@@ -3,13 +3,14 @@
 language: python
 dist: xenial
 python:
-  - 3.8-dev
+  - "3.9-dev"
+  - "3.8"
   - "3.7"
   - "3.6"
   - "3.5"
   - "2.7"
-  - pypy
-  - pypy3
+  - "pypy"
+  - "pypy3"
 
 # Command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: pip install -U tox tox-travis codecov

tox.ini

@@ -1,20 +1,24 @@
 [tox]
 envlist =
-    py37-linters,
-    py27-dp{06,07,latest},
-    py35-dp{06,07,latest},
-    py36-dp{06,07,latest},
-    py37-dp{06,07,latest},
-    py38-dp{06,07,latest},
-    pypy-dp{06,07,latest},
-    pypy3-dp{06,07,latest}
+    py38-linters,
+    py27-dp{06,07,08,09},
+    py35-dp{06,07,08,09},
+    py36-dp{06,07,08,09,10,latest},
+    py37-dp{06,07,08,09,10,latest},
+    py38-dp{06,07,08,09,10,latest},
+    py39-dp{06,07,08,09,10,latest},
+    pypy-dp{06,07,08,09},
+    pypy3-dp{06,07,08,09,10,latest}
 
 [testenv:py37-linters]
 deps = black
 commands = black --check --verbose setup.py dogpile_filesystem tests
 
 [testenv]
 deps =
+    dp10: dogpile.cache~=1.0.0
+    dp09: dogpile.cache~=0.9.0
+    dp08: dogpile.cache~=0.8.0
     dp07: dogpile.cache~=0.7.0
     dp06: dogpile.cache~=0.6.0
     dplatest: dogpile.cache