Update pythons and pytests

Author: youtux

.travis.yml

@@ -1,10 +1,11 @@
 language: python
-dist: xenial
+dist: bionic
 python:
   - "2.7"
   - "3.5"
   - "3.6"
   - "3.7"
+  - "3.8"
 
 install:
   - pip install tox tox-travis

tox.ini

@@ -1,14 +1,16 @@
 [tox]
 distshare = {homedir}/.tox/distshare
 envlist = py27-pytest{43,44,45,46},
-          py37-pytest{43,44,45,46,5,latest},
-          py{35,36}-pytestlatest
+          py38-pytest{43,44,45,46,50,51,52,latest},
+          py{35,36,37}-pytestlatest
 
 [testenv]
 commands = pytest --junitxml={envlogdir}/junit-{envname}.xml {posargs:tests}
 deps =
     pytestlatest: pytest
-    pytest5: pytest~=5.0.0
+    pytest52: pytest~=5.2.0
+    pytest51: pytest~=5.1.0
+    pytest50: pytest~=5.0.0
     pytest46: pytest~=4.6.0
     pytest45: pytest~=4.5.0
     pytest44: pytest~=4.4.0