Merge pull request #903 from wordpress-mobile/release/v1.3.40

Updated Changelog and README files for release v1.3.40

Author: anitaa1990

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## [1.3.40](https://github.com/wordpress-mobile/AztecEditor-Android/releases/tag/v1.3.40)
+### Changed
+- Adds support to to customise styles for the Aztec Toolbar
+
 ## [1.3.39](https://github.com/wordpress-mobile/AztecEditor-Android/releases/tag/v1.3.39)
 ### Fixed
 - Move media button initialization to avoid crash when advanced toolbar is enabled and media button is disabled

README.md

@@ -105,7 +105,7 @@ repositories {
 ```
 ```gradle
 dependencies {
-    api ('com.github.wordpress-mobile.WordPress-Aztec-Android:aztec:v1.3.39')
+    api ('com.github.wordpress-mobile.WordPress-Aztec-Android:aztec:v1.3.40')
 }
 ```