upgrade spring 4.2.9 (#111)

* upgrade spring

* Update pom.xml

Author: pjfanning

pom.xml

@@ -74,7 +74,7 @@
     <slf4j.version>1.7.36</slf4j.version>
     <log4j.version>2.17.1</log4j.version>
 
-    <spring.version>4.2.1.RELEASE</spring.version>
+    <spring.version>4.2.9.RELEASE</spring.version>
 
     <javax.jcr.version>2.0</javax.jcr.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>