chore: use only released versions in dependencies

Author: BernhardFuchs

pom.xml

@@ -126,7 +126,7 @@
 		<dependency>
 			<groupId>info.weboftrust</groupId>
 			<artifactId>ld-signatures-java</artifactId>
-			<version>0.3-SNAPSHOT</version>
+			<version>0.3.0</version>
 		</dependency>
 		<dependency>
 			<groupId>com.nimbusds</groupId>