Release version 1.9

Author: meier-rene

pom.xml

@@ -12,7 +12,7 @@
     </parent>
     <groupId>io.github.massbank</groupId>
     <artifactId>massbank-export-api</artifactId>
-    <version>v1.9-SNAPSHOT</version>
+    <version>1.9</version>
     <name>MassBank-export-api</name>
     <description>Microservice for the export of different file formats for MassBank</description>