Add changes to changelog

Author: fassko

Changelog.md

@@ -9,6 +9,8 @@ Current master
 5.0.0
 -----
 - Update to Swift 5.0 and Xcode 10.2 See [#59](https://github.com/RxSwiftCommunity/NSObject-Rx/pull/67) - [@fassko](https://github.com/fassko)
+- Build in Circle CI 2.0 and remove Pods from repo. See [#59](https://github.com/RxSwiftCommunity/NSObject-Rx/pull/68) - [@fassko](https://github.com/fassko)
+- Increase watchOS minimum version. See [#59](https://github.com/RxSwiftCommunity/NSObject-Rx/pull/68) - [@fassko](https://github.com/fassko)
 
 4.4.1
 -----