Test on latest PyPy (#236)

Test on latest PyPy

Author: nicoddemus

.travis.yml

@@ -7,8 +7,8 @@ python:
   - '3.5'
   - '3.6'
   - '3.7'
-  # - 'pypy2.7-6.0'
-  - 'pypy3.5-6.0'
+  # - 'pypy'
+  - 'pypy3'
 
 env:
   global:
@@ -51,8 +51,8 @@ matrix:
       env: DEPS="pytest~=2.9.0"
 
   allow_failures:
-  - python: 'pypy2.7-6.0'
-  - python: 'pypy3.5-6.0'
+  - python: 'pypy'
+  - python: 'pypy3'
 
 install:
   - pip install -U coverage coverage-enable-subprocess pip setuptools setuptools_scm