Merge pull request #333 from graphql-java-kickstart/renovate/javax.servlet-javax.servlet-api-4.x

chore(deps): update dependency javax.servlet:javax.servlet-api to v4

Author: oliemansm

graphql-java-servlet/build.gradle

@@ -17,7 +17,7 @@ dependencies {
     api(project(':graphql-java-kickstart'))
 
     // Servlet
-    api 'javax.servlet:javax.servlet-api:3.1.0'
+    api 'javax.servlet:javax.servlet-api:4.0.1'
     api 'javax.websocket:javax.websocket-api:1.1'
     implementation "org.slf4j:slf4j-api:$LIB_SLF4J_VER"