Bump version to v1.3.9

Author: mzorz

CHANGELOG.md

@@ -1,4 +1,11 @@
 # Changelog
+## [1.3.9](https://github.com/wordpress-mobile/AztecEditor-Android/releases/tag/v1.3.9) - 2018-09-06
+### Added
+- Added support for creating links that open in a new window.
+
+### Fixed
+- Fixed: don't perform initial hash calculation when pasting content
+
 ## [1.3.8](https://github.com/wordpress-mobile/AztecEditor-Android/releases/tag/v1.3.8) - 2018-08-28
 ### Added
 - Added the ability to use the new Android 8 feature "paste as plain text"

README.md

@@ -106,7 +106,7 @@ repositories {
 ```
 ```gradle
 dependencies {
-    api ('com.github.wordpress-mobile.WordPress-Aztec-Android:aztec:v1.3.8')
+    api ('com.github.wordpress-mobile.WordPress-Aztec-Android:aztec:v1.3.9')
 }
 ```