Upgrade to CGLIB 3.1 and Objenesis 2.1

Issue: SPR-11226

build.gradle

@@ -164,12 +164,12 @@ project("spring-build-src") {
 project("spring-core") {
 	description = "Spring Core"
 
-	// As of Spring 4.0, spring-core includes asm 4.2 and repackages cglib 3.0, inlining
-	// both into the spring-core jar. cglib 3.0 itself depends on asm 4, and is therefore
+	// As of Spring 4.0, spring-core includes asm 4.2 and repackages cglib 3.1, inlining
+	// both into the spring-core jar. cglib 3.1 itself depends on asm 4, and is therefore
 	// further transformed by the JarJar task to depend on org.springframework.asm; this
 	// avoids including two different copies of asm unnecessarily.
-	def cglibVersion = "3.0"
-	def objenesisVersion = "2.0"
+	def cglibVersion = "3.1"
+	def objenesisVersion = "2.1"
 
 	configurations {
 		jarjar