Update the version of JReleaser

Update the version of JReleaser, reset the version to 0.3.0-SNAPSHOT
and revert spurious \r\n line endings.

Signed-off-by: Andrea Frittoli <andrea.frittoli@gmail.com>

Author: afrittoli

generator/pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>dev.cdevents</groupId>
         <artifactId>cdevents-sdk-java-parent</artifactId>
-        <version>0.3.1</version>
+        <version>0.3.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>cdevents-sdk-java-generator</artifactId>