Bump version to v0.6.0, updated dependencies

Cargo.toml

@@ -1,27 +1,27 @@
 [package]
 authors = ["Y. T. Chung <[email protected]>"]
 name = "mqtt-protocol"
-version = "0.5.0"
+version = "0.6.0"
 license = "MIT/Apache-2.0"
 description = "MQTT Protocol Library"
 keywords = ["mqtt", "protocol"]
 repository = "https://github.com/zonyitoo/mqtt-rs"
 documentation = "https://docs.rs/mqtt-protocol"
 
 [dependencies]
-byteorder = "1.0"
-log = "0.3"
-regex = "0.2"
-lazy_static = "0.2"
-tokio-io = "0.1.7"
-futures = "0.1.22"
+byteorder = "1.2"
+log = "0.4"
+regex = "1.0"
+lazy_static = "1.1"
+tokio-io = "0.1"
+futures = "0.1"
 
 [dev-dependencies]
-clap = "2.23"
-env_logger = "0.4"
-uuid = { version = "0.4", features = ["v4"] }
+clap = "2"
+env_logger = "0.5"
+uuid = { version = "0.7", features = ["v4"] }
 time = "0.1"
-tokio = "0.1.7"
+tokio = "0.1"
 
 [lib]
 name = "mqtt"