Adjust dependencies + prepare next minor release

pom.xml

@@ -65,12 +65,11 @@
   </scm>
 
   <properties>
-    <revision>2.5</revision>
+    <revision>2.4.1</revision>
     <changelist>-SNAPSHOT</changelist>
     <jenkins.version>2.222.4</jenkins.version>
     <java.level>8</java.level>
     <antlr4.version>4.9.2</antlr4.version>
-    <jcasc.version>1.51</jcasc.version>
   </properties>
 
   <repositories>
@@ -112,11 +111,9 @@
     <dependency>
       <groupId>io.jenkins</groupId>
       <artifactId>configuration-as-code</artifactId>
-      <version>${jcasc.version}</version>
       <optional>true</optional>
     </dependency>
 
-
     <!-- test dependencies -->
     <dependency>
       <groupId>org.mockito</groupId>
@@ -155,7 +152,6 @@
     <dependency>
       <groupId>io.jenkins.configuration-as-code</groupId>
       <artifactId>test-harness</artifactId>
-      <version>${jcasc.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>