Updated graphql-java-servlet to 7.1.0

Author: oliemansm

gradle.properties

@@ -40,7 +40,7 @@ LIB_GRAPHQL_JAVA_VER = 11.0
 LIB_JUNIT_VER = 4.12
 LIB_SPRING_CORE_VER = 5.0.4.RELEASE
 LIB_SPRING_BOOT_VER = 2.1.0.RELEASE
-LIB_GRAPHQL_SERVLET_VER = 7.0.0
+LIB_GRAPHQL_SERVLET_VER = 7.1.0
 LIB_GRAPHQL_JAVA_TOOLS_VER = 5.4.0
 LIB_COMMONS_IO_VER = 2.6
 kotlin.version=1.3.10