updated to v0.4

zonyitoo · zonyitoo · commit bc96904e23a2 · 2017-02-03T19:18:03.000+08:00
diff --git a/README.md b/README.md
@@ -16,7 +16,7 @@ This crate works with Cargo and can be found on
 
 ```toml
 [dependencies]
-bson = "0.3.2"
+bson = "0.4"
 ```
 ## Usage
 Link the library in _main.rs_:
