bump version to 1.8.3 in pom.xml and add getValues method to AgentContext for improved value retrieval

pom.xml

@@ -4,7 +4,7 @@
 	<artifactId>lm-lib</artifactId>
 	<groupId>de.extio</groupId>
 	<name>lm-lib</name>
-	<version>1.8.2</version>
+	<version>1.8.3</version>
 	
 	<properties>
 		<java.version>21</java.version>

src/main/java/de/extio/lmlib/agent/AgentContext.java

@@ -120,6 +120,14 @@ public final class AgentContext {
 		throw new IllegalArgumentException("Value for key '" + key + "' is not of type " + type.getName());
 	}
 
+	public <T> List<T> getValues(final String key, final Class<T> type) {
+		final var values = this.context.get(key);
+		if (values == null) {
+			return null;
+		}
+		return values.stream().map(type::cast).collect(Collectors.toCollection(ArrayList::new));
+	}
+	
 	public <T> void setValue(final String key, final T value) {
 		if (value == null) {
 			this.context.remove(key);