update README

LyricTian · LyricTian · commit 51174a89fbb0 · 2016-08-14T19:11:46.000+08:00
diff --git a/README.md b/README.md
@@ -33,7 +33,7 @@
 ### Download and install
 
 ``` bash
-$ go get -u gopkg.in/oauth2.v3
+$ go get -u gopkg.in/oauth2.v3/...
 ```
 
 ### Create file `server.go`
