Update library version in build.gradle

Update the library version in build.gradle from the long outdated
"0.5-SNAPSHOT" to "1.0.2", matching the maven pom.xml.

Author: robert-s-ubi

build.gradle

@@ -15,7 +15,7 @@ buildscript {
 
 allprojects {
     group = 'eu.chargetime.ocpp'
-    version = '0.5-SNAPSHOT'
+    version = '1.0.2'
 }
 
 subprojects {