Updates to README file

README.md

@@ -29,7 +29,7 @@ Simply add the following to your `Cargo.toml` file:
 
 ```toml
 [dependencies]
-rocket-basicauth = "2"
+rocket-basicauth = "3"
 ```
 
 #### Disabling logging
@@ -41,6 +41,15 @@ By default, this crate uses the [`log`](https://crates.io/crates/log) library to
 rocket-basicauth = { version = "2", default-features = false }
 ```
 
+#### Rocket 0.5-rc1 to 0.5-rc3
+
+Version 2.0 supports the pre-release versions of Rocket 0.5 RC1 to RC3
+
+```toml
+[dependencies]
+rocket-basicauth = "2"
+```
+
 #### Rocket 0.4
 
 Support for Rocket 0.4 is **decrepit** in the eyes of this crate but may still be used by changing the version, to do this, instead write: