[#31] bump version to v0.1.5

Author: zonyitoo

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bson"
-version = "0.1.4"
+version = "0.1.5"
 authors = ["Y. T. Chung <[email protected]>"]
 description = "Encoding and decoding support for BSON in Rust"
 license = "MIT"
@@ -22,4 +22,4 @@ time = "0.1"
 
 [dependencies.num]
 version = "~0.1.27"
-default-features = false
+default-features = false