Add changelog for 0.42.0

Author: csadilek

docs/changelog.md

@@ -3,16 +3,24 @@ layout: page
 title: Changelog
 permalink: /changelog/
 ---
+# 0.43.0-SNAPSHOT  (In Development)
 
-# 0.42.0-SNAPSHOT  (In Development)
-
-* [Commits](https://github.com/mozilla-mobile/android-components/compare/v0.41.0...master)
-* [Milestone](https://github.com/mozilla-mobile/android-components/milestone/44?closed=1)
-* [API reference](https://mozilla-mobile.github.io/android-components/api/0.41.0/index)
+* [Commits](https://github.com/mozilla-mobile/android-components/compare/v0.42.0...master)
+* [Milestone](https://github.com/mozilla-mobile/android-components/milestone/45?closed=1)
+* [API reference](https://mozilla-mobile.github.io/android-components/api/0.42.0/index)
 * [Dependencies](https://github.com/mozilla-mobile/android-components/blob/master/buildSrc/src/main/java/Dependencies.kt)
 * [Gecko](https://github.com/mozilla-mobile/android-components/blob/master/buildSrc/src/main/java/Gecko.kt)
 * [Configuration](https://github.com/mozilla-mobile/android-components/blob/master/buildSrc/src/main/java/Config.kt)
 
+# 0.42.0
+
+* [Commits](https://github.com/mozilla-mobile/android-components/compare/v0.41.0...v0.42.0)
+* [Milestone](https://github.com/mozilla-mobile/android-components/milestone/44?closed=1)
+* [API reference](https://mozilla-mobile.github.io/android-components/api/0.42.0/index)
+* [Dependencies](https://github.com/mozilla-mobile/android-components/blob/v0.42.0/buildSrc/src/main/java/Dependencies.kt)
+* [Gecko](https://github.com/mozilla-mobile/android-components/blob/v0.42.0/buildSrc/src/main/java/Gecko.kt)
+* [Configuration](https://github.com/mozilla-mobile/android-components/blob/v0.42.0/buildSrc/src/main/java/Config.kt)
+
 * **engine-gecko-nightly**
   * Now also serves as an implementation of `concept-fetch` by providing the new `GeckoViewFetchClient`. This allows applications to rely on Gecko's networking capabilities when issuing HTTP requests, even outside the browser view (GeckoView).