Added usage instructions to README.md.

Author: cheeseng

README.md

@@ -1,10 +1,31 @@
 # ScalaTest + Mockito
 ScalaTest + Mockito provides integration support between ScalaTest and Mockito.
 
+**Usage**
+
+To use it for ScalaTest 3.1.2 and Mockito 3.3.x: 
+
+SBT: 
+
+```
+libraryDependencies += "org.scalatestplus" %% "mockito-3-2" % "3.1.2.0" % "test"
+```
+
+Maven: 
+
+```
+<dependency>
+  <groupId>org.scalatestplus</groupId>
+  <artifactId>mockito-3-3</artifactId>
+  <version>3.1.2.0</version>
+  <scope>test</scope>
+</dependency>
+```
+
 **Publishing**
 
 Please use the following commands to publish to Sonatype: 
 
 ```
 $ sbt +publishSigned
-```
+```