point readme version to 1.5.0

Author: KodrAus

README.md

@@ -31,7 +31,7 @@ Add the following dependency to your Cargo manifest...
 
 ```toml
 [dependencies]
-lazy_static = "1.4.0"
+lazy_static = "1.5.0"
 ```
 
 ...and see the [docs](https://docs.rs/lazy_static) for how to use it.