Update CI config

Author: errordeveloper

.travis.yml

@@ -3,11 +3,11 @@ dist: xenial
 go:
   - 1.10.x
   - 1.11.x
+  - 1.12.x
 script:
-  - go get -t -v ./...
-  - diff -u <(echo -n) <(gofmt -d .)
+  - diff -u <(echo -n) <(gofmt -d *.go)
   - diff -u <(echo -n) <(golint $(go list -e ./...) | grep -v YAMLToJSON)
-  - go tool vet .
+  - go vet .
   - go test -v -race ./...
 install:
   - go get golang.org/x/lint/golint