Ensure correct connect and disconnect functionality

• move IntList to TestUtils
• make resolve-element for wildcard connections a method (instead of an attribute). would never be a cache-hit anyway
• extend base.clean to remove generated aspects as well
• fixing imports
• introduced new types to encapsulate behaviour: RagConnectTokenMap, RagConnectPublisher
• move lastValue (of sendDefinitions) into new publisher
• create connectToken outside of handlers
• MqttHandler:
  • make wildcardPatterns a list
  • added Lock to avoid simultaneous access/modification of AST
• RestHandler: update dependency requirement to Spark 3.9.3 in order to unmap existing routes upon disconnect
• testing disconnect functionality in (most) existing tests

Closes #31 (closed)

pages/docs/adding.md

@@ -125,6 +125,6 @@ RagConnect itself does not introduce dependencies.
 However, depending on the selected protocols (see [compiler options](using#compiler-options)), additional dependencies are required.
 
 | Protocol | Dependency (Gradle format) | Remarks |
-|-|-|-|
+|---|---|---|
 | `mqtt` | `group: 'org.fusesource.mqtt-client', name: 'mqtt-client', version: '1.15'` | Mqtt is selected by default, so this dependency therefore is required "by default". Might work with other versions as well. |
-| `rest` | `group: 'com.sparkjava', name: 'spark-core', version: '2.9.2'` | Might work with other versions as well. For debugging, it is beneficial to include an implementation for [SLF4J](http://www.slf4j.org/). |
+| `rest` | `group: 'com.sparkjava', name: 'spark-core', version: '2.9.3'` | Might work with newer versions as well. For debugging, it is beneficial to include an implementation for [SLF4J](http://www.slf4j.org/). |