1.9.0 release (previous 1.8.0) + release notes updated [ci skip]

Author: shipkit-org

docs/release-notes.md

@@ -1,5 +1,9 @@
 <sup><sup>*Release notes were automatically generated by [Shipkit](http://shipkit.org/)*</sup></sup>
 
+#### 1.9.0
+ - 2019-12-05 - [2 commits](https://github.com/mockito/mockito-scala/compare/v1.8.0...v1.9.0) by [Bruno Bonanno](https://github.com/bbonanno) (1), [Scala Steward](https://github.com/scala-steward) (1) - published to [![Bintray](https://img.shields.io/badge/Bintray-1.9.0-green.svg)](https://bintray.com/mockito/maven/mockito-scala/1.9.0)
+ - Update scalatest to 3.1.0 [(#178)](https://github.com/mockito/mockito-scala/pull/178)
+
 #### 1.8.0
  - 2019-12-01 - [8 commits](https://github.com/mockito/mockito-scala/compare/v1.7.1...v1.8.0) by [Bruno Bonanno](https://github.com/bbonanno) (4), [Scala Steward](https://github.com/scala-steward) (4) - published to [![Bintray](https://img.shields.io/badge/Bintray-1.8.0-green.svg)](https://bintray.com/mockito/maven/mockito-scala/1.8.0)
  - Update mockito-core to 3.2.0 [(#177)](https://github.com/mockito/mockito-scala/pull/177)

version.properties

@@ -1,4 +1,4 @@
 #Version of the produced binaries. This file is intended to be checked-in.
 #It will be automatically bumped by release automation.
-version=1.9.0
-previousVersion=1.8.0
+version=1.9.1
+previousVersion=1.9.0