TASK: Updating version in README

Author: Auto Mation

README.md

@@ -170,7 +170,7 @@ The latest stable SDK release can be retrieved from [jcenter](https://bintray.co
 ```gradle
 ext {
     versions = [
-        commercetools: "1.5.0"
+        commercetools: "1.5.1"
     ]
 }
 
@@ -188,7 +188,7 @@ dependencies {
 ```
 ```maven
 <properties>
-    <commercetools.version>1.5.0</commercetools.version>
+    <commercetools.version>1.5.1</commercetools.version>
 <properties
 <dependencies>
     <dependency>