Bump undertow-servlet from 2.1.3.Final to 2.2.0.Final (#63)

Bumps [undertow-servlet](https://github.com/undertow-io/undertow) from 2.1.3.Final to 2.2.0.Final.
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](undertow-io/undertow@2.1.3.Final...2.2.0.Final)

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http-server-undertow/build.gradle

@@ -5,7 +5,7 @@ dependencies {
     api project(":servlet-engine")
     api "io.micronaut:micronaut-http-server:$micronautVersion"
 
-    implementation 'io.undertow:undertow-servlet:2.1.3.Final'
+    implementation 'io.undertow:undertow-servlet:2.2.0.Final'
     testAnnotationProcessor "io.micronaut:micronaut-inject-java"
     testImplementation "io.micronaut:micronaut-inject-groovy"
     testImplementation "io.micronaut:micronaut-http-client"