Merge pull request #28 from aws-samples/dependabot/maven/org.springframework-spring-webmvc-5.3.18

Bump spring-webmvc from 5.2.0.RELEASE to 5.3.18

Author: t0shiii

pom.xml

@@ -9,7 +9,7 @@
   <url>http://maven.apache.org</url>
 
   <properties>
-    <spring.version>5.2.0.RELEASE</spring.version>
+    <spring.version>5.3.18</spring.version>
   </properties>
 
   <dependencyManagement>