chore: update version to 15.1.0

Author: oliemansm

gradle.properties

@@ -1,4 +1,4 @@
-version=15.0.1-SNAPSHOT
+version=15.1.0-SNAPSHOT
 group=com.graphql-java-kickstart
 PROJECT_NAME=graphql-java-servlet
 PROJECT_DESC=GraphQL Java Kickstart
@@ -12,4 +12,4 @@ LIB_JACKSON_VER=2.15.0
 LIB_SLF4J_VER=2.0.7
 LIB_LOMBOK_VER=1.18.26
 SOURCE_COMPATIBILITY=17
-TARGET_COMPATIBILITY=17
+TARGET_COMPATIBILITY=17