Allow 3.8 to fail (pending resolve of https://bugs.python.org/issue38227).

Author: ionelmc

Diff for: .travis.yml

@@ -10,6 +10,9 @@ stages:
   - lint
   - examples
   - tests
+matrix:
+  allow_failures:
+  - python: '3.8-dev'
 jobs:
   include:
     - stage: lint

Diff for: ci/templates/.travis.yml

@@ -9,6 +9,9 @@ stages:
   - lint
   - examples
   - tests
+matrix:
+  allow_failures:
+  - python: '3.8-dev'
 jobs:
   include:
     - stage: lint