ci: Update Go version to 1.14

Author: g3force

.circleci/config.yml

@@ -18,7 +18,7 @@ jobs:
 
   backend:
     docker:
-    - image: circleci/golang:1.10
+    - image: circleci/golang:1.14
     working_directory: /go/src/github.com/RoboCup-SSL/ssl-status-board
     steps:
     - checkout
@@ -45,7 +45,7 @@ jobs:
 
   publish-github-release:
     docker:
-    - image: circleci/golang:1.10
+    - image: circleci/golang:1.14
     steps:
     - attach_workspace:
         at: .