Update README.md

Author: swhitty

README.md

@@ -15,7 +15,7 @@ Timeout can be installed by using Swift Package Manager.
 To install using Swift Package Manager, add this to the `dependencies:` section in your Package.swift file:
 
 ```swift
-.package(url: "https://github.com/swhitty/swift-timeout.git", .upToNextMajor(from: "0.2.0"))
+.package(url: "https://github.com/swhitty/swift-timeout.git", .upToNextMajor(from: "0.3.0"))
 ```
 
 # Usage