Change version in README (#161)

Author: tunniclm

README.md

@@ -281,9 +281,10 @@ This project uses a semver-parsable X.0.Z version number for releases, where X i
 Non-release versions of this project (for example on github.com/RuntimeTools/SwiftMetrics) will use semver-parsable X.0.Z-dev.B version numbers, where X.0.Z is the last release with Z incremented and B is an integer. For further information on the development process go to the  [SwiftMetrics wiki][1]: [Developing](https://github.com/RuntimeTools/SwiftMetrics/wiki/Developing).
 
 ## Version
-1.2.5
+2.0.0
 
 ## Release History
+`2.0.0` - Dependency update to use Kitura 2
 `1.2.5` - Minor fixes.  
 `1.2.4` - Prometheus support, memory graph checkboxes, URL filtering & drop Swift 3.0 support.  
 `1.2.3` - Dependency updates, graph resizing and Swift 4 support.