Adds go module support that came into effect in go version 1.11 (#201)

Adds go module support that came into effect in go version 1.11

.travis.yml

@@ -15,17 +15,12 @@ matrix:
 
     - language: go
       go:
-        - 1.10.x
-      before_install:
-        - go get -t -v ./...
+        - 1.11.x
+      env:
+        - GO111MODULE=on
+      install: true
+      
       script:
-        - ./testdata/test.sh
-      install:
-        - go get github.com/gorilla/websocket
-        - go get github.com/toorop/go-pusher
-        - go get github.com/thrasher-/socketio
-        - go get github.com/beatgammit/turnpike
-        - go get github.com/gorilla/mux
-        - go get golang.org/x/crypto/scrypt
+        - go test -race -coverprofile=./testdata/coverage.txt -covermode=atomic  ./...
       after_success:
         - bash <(curl -s https://codecov.io/bash)