Merge pull request #386 from HaraldNordgren/go_versions

Bump Go versions and use '.x' to always get latest patch versions

.travis.yml

@@ -11,8 +11,8 @@ addons:
   postgresql: "9.6"
 
 go:
-  - 1.10.4
-  - 1.11
+  - 1.10.x
+  - 1.11.x
 
 before_install:
   - ./script/check_formatting.sh
@@ -25,4 +25,4 @@ script:
   - make build
   - make test
   - make test-all
-  - make docker-release
+  - make docker-release