*: update go version

.travis.yml

@@ -3,9 +3,8 @@ language: go
 sudo: required
 
 go:
-  - 1.8
-  - 1.9
   - '1.10'
+  - '1.11'
 
 go_import_path: github.com/dexidp/dex
 

Dockerfile

-FROM golang:1.10.2-alpine
+FROM golang:1.11.1-alpine
 
 RUN apk add --no-cache --update alpine-sdk