Upgrade dependencies

Author: oliemansm

gradle.properties

@@ -15,13 +15,13 @@ LIB_PROJECT_REACTOR_VER = 1.0.1
 
 ### Test libraries
 
-LIB_GRAPHQL_TOOLS_VER = 6.0.0
-LIB_GRAPHQL_SPRING_VER = 7.0.0
-LIB_GRAPHQL_JAVA_VER = 14.0
-LIB_GRAPHQL_SERVLET_VER = 9.0.1
+LIB_GRAPHQL_TOOLS_VER = 6.3.0
+LIB_GRAPHQL_SPRING_VER = 8.1.1
+LIB_GRAPHQL_JAVA_VER = 15.0
+LIB_GRAPHQL_SERVLET_VER = 10.1.0
 
 ### Gradle Plugins
 
-LIB_SPRING_BOOT_VER = 2.2.5.RELEASE
+LIB_SPRING_BOOT_VER = 2.3.6.RELEASE
 LIB_BINTRAY_PLUGIN_VER = 1.8.4
 LIB_RELEASE_PLUGIN_VER = 2.8.1