Add golint to CI checks

Author: Jacobious52

.travis.yml

@@ -15,6 +15,7 @@ go:
 before_install:
   # install goreturns for linting
   - go get -u github.com/sqs/goreturns
+  - go get -u golang.org/x/lint/golint
 
 script:
   - make lint

lint.sh

@@ -2,6 +2,9 @@
 
 # Use Goreturns as a linter to pick up spacing formatting. Return exit code 1 if there are any errors
 # Runs gofmt + goimports
-
+# go returns
 OUTPUT="$(goreturns -d -e cmd/ pkg/)"
 test -z "$OUTPUT" || ((>&2 echo -e "$OUTPUT" "\ntry running 'make fmt'") && exit 1)
+
+# golint
+golint -set_exit_status ./...