Update golang image version.

d-kuro · skanehira · commit ee59208fba7a · 2019-03-22T20:39:28.000+09:00
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -135,10 +135,10 @@ workflows:
   latest-build:
     jobs:
       - lint:
-          go-version: "1.12.0"
+          go-version: "1.12.1"
           golangci-lint-version: "1.15.0"
       - build:
-          go-version: "1.12.0"
+          go-version: "1.12.1"
           requires:
             - lint
 
