Disable python3.8-dev tests

Author: bogdandm

.travis.yml

@@ -22,7 +22,7 @@ matrix:
   include:
     - python: 3.7
     - python: 3.7-dev
-    - python: 3.8-dev
+    # - python: 3.8-dev
 
 deploy:
   - provider: pypi
@@ -46,4 +46,4 @@ deploy:
     on:
       repo: bogdandm/json2python-models
       tags: true
-      all_branches: false
+      all_branches: false