Update Changelog for release of version 4.5.0

Author: LaunchDarklyCI

CHANGELOG.md

@@ -3,6 +3,10 @@
 
 All notable changes to the LaunchDarkly Java SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [4.5.0] - 2018-10-26
+### Added:
+It is now possible to inject feature flags into the client from local JSON or YAML files, replacing the normal LaunchDarkly connection. This would typically be for testing purposes. See `com.launchdarkly.client.files.FileComponents`.
+
 ## [4.4.1] - 2018-10-15
 ### Fixed:
 - The SDK's Maven releases had a `pom.xml` that mistakenly referenced dependencies that are actually bundled (with shading) inside of our jar, resulting in those dependencies being redundantly downloaded and included (without shading) in the runtime classpath, which could cause conflicts. This has been fixed. ([#122](https://github.com/launchdarkly/java-client/issues/122))