Allow golang 1.14 to fail

.travis.yml

@@ -6,7 +6,6 @@ dist: trusty
 
 go:
   - 1.13.x
-  - 1.14.x
   - master
 
 before_script: make prepare
@@ -18,3 +17,4 @@ script:
 matrix:
   allow_failures:
     - go: master
+    - go: 1.14.x  # because of golangci-lint