Merge pull request #28 from divebomb/master

Add: travis
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..1f68335
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,11 @@
+language: go
+
+go:
+  - "1.11"
+  - "1.12"
+  - "1.13"
+
+script:
+  - go fmt ./... && [[ -z `git status -s` ]]
+  - GO111MODULE=on && go mod vendor && go test ./... -bench . -race -v
+
diff --git a/go.mod b/go.mod
index 3ae211e..524bd21 100644
--- a/go.mod
+++ b/go.mod
@@ -11,3 +11,5 @@
 	go.uber.org/zap v1.10.0
 	golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53
 )
+
+go 1.13