Be more precise on the supported versions and add a FAQ entry (#403)

Author: fbenz

spring-auto-restdocs-docs/getting-started.adoc

@@ -6,14 +6,16 @@
 
 Spring Auto REST Docs has the following minimum requirements:
 
-* Java 8 or Kotlin 1.2
+* Java 8 or Kotlin 1.3
 * Spring REST Docs ${spring-restdocs.version} (see http://docs.spring.io/spring-restdocs/docs/${spring-restdocs.version}/reference/html5/[documentation])
 * Jackson has to be used for creating and parsing JSON
 
 For Java 7 and Spring REST Docs 1.2.x support,
 please use the 1.0.x version of Spring Auto REST Docs.
 
-For Java 9/10/11 support, use `spring-auto-restdocs-json-doclet-jdk9` as doclet dependency.
+For Java 9+ support, use `spring-auto-restdocs-json-doclet-jdk9` as doclet dependency.
+Our support is focused on the latest Kotlin version, Java 8 and 11.
+In addition, we try to support the latest Java version that is supported by Spring.
 
 [[gettingstarted-usage]]
 === Usage

spring-auto-restdocs-docs/index.adoc

@@ -75,6 +75,8 @@ Can I regenerate the final HTML without running all tests?::
   in your setup. You might have to remove `dependsOn test` depending on your setup to run it standalone.
 Is HATEOAS supported?::
   Yes, there is basic support for <<snippets-links,links>> and <<snippets-embedded,embedded>> resources.
+What should I do if I get a `NoSuchBeanDefinitionException: No bean named 'webHandler' available` exception?::
+  This means that the servlet stack instead if the reactive one is active. Make sure that `@EnableWebFlux` is used.
 
 include::getting-started.adoc[]