Merge branch 'go-1-14' into 'master'

Test against go 1.12 - 1.14

See merge request gitlab-org/gitlab-workhorse!467

.gitlab-ci.yml

-image: golang:1.11
+image: golang:1.12
 
 # Disable DIND for SAST because we need to execute a before_script in the gosec-sast job
 variables:
@@ -21,9 +21,6 @@ verify:
   - apt-get update && apt-get -y install libimage-exiftool-perl
   - make test
 
-test using go 1.11:
-  <<: *test_definition
-
 test using go 1.12:
   image: golang:1.12
   <<: *test_definition
@@ -32,6 +29,10 @@ test using go 1.13:
   image: golang:1.13
   <<: *test_definition
 
+test using go 1.14:
+  image: golang:1.14
+  <<: *test_definition
+
 test:release:
   only:
     - tags