Bump javax.servlet-api from 3.1.0 to 4.0.1

Bumps [javax.servlet-api](https://github.com/javaee/servlet-spec) from 3.1.0 to 4.0.1.
- [Release notes](https://github.com/javaee/servlet-spec/releases)
- [Commits](javaee/servlet-spec@3.1.0...4.0.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot-support

pom.xml

@@ -565,7 +565,7 @@
 		<selenium.version>2.53.1</selenium.version>
 
 		<!-- Redefine default value from spring-boot-dependencies (https://github.com/spring-projects/spring-boot/blob/v1.5.16.RELEASE/spring-boot-dependencies/pom.xml) -->
-		<servlet-api.version>3.1.0</servlet-api.version>
+		<servlet-api.version>4.0.1</servlet-api.version>
 
 		<skipUnitTests>false</skipUnitTests>