Upgrade to Spring Framework 5.3.13.

Author: jxblum

gradle.properties

@@ -9,7 +9,7 @@ mockitoVersion=4.0.0
 multithreadedtcVersion=1.01
 pivotalCloudCacheVersion=1.13.3
 pivotalGemFireVersion=9.10.10
-springVersion=5.3.12
+springVersion=5.3.13
 springBootVersion=2.4.13-SNAPSHOT
 springCloudBindingsVersion=1.7.1
 springDataBomVersion=2020.0.14