Update to Spring Framework 5.3.31

Closes gh-1478

gradle.properties

@@ -2,7 +2,7 @@ version=0.4.5-SNAPSHOT
 org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true
 org.gradle.caching=true
-springFrameworkVersion=5.3.30
+springFrameworkVersion=5.3.31
 springSecurityVersion=5.8.8
 springJavaformatVersion=0.0.38
 springJavaformatExcludePackages=org/springframework/security/config org/springframework/security/oauth2