Change the way the plugin applies to itself

CHANGES.md

@@ -7,7 +7,7 @@ Features
 Non-functional changes
 ----------------------
 * [#35](https://github.com/Zlika/reproducible-build-maven-plugin/pull/35): Publish buildable source archive of this plugin to Maven central when releasing - [@hboutemy](https://github.com/hboutemy).
-* The plugin is now built reproducibly using a previous version.
+* The plugin is now built reproducibly using itself.
 
 Release 0.8 (2018/11/27)
 ===========

pom.xml

@@ -83,8 +83,6 @@
     <maven-surefire-plugin.version>2.22.1</maven-surefire-plugin.version>
     <maven-surefire-report-plugin.version>2.22.1</maven-surefire-report-plugin.version>
     <wagon-gitsite.version>0.3.1</wagon-gitsite.version>
-    <!-- Previous version of the plugin is used to make its build reproducible -->
-    <reproducible-build-maven-plugin.prevversion>0.8</reproducible-build-maven-plugin.prevversion>
 
     <!-- Dependency versions -->
     <commons-compress.version>1.18</commons-compress.version>
@@ -308,11 +306,11 @@
         </executions>
       </plugin>
 
-      <!-- Previous version of the plugin is used to make its build reproducible -->
+      <!-- The plugin is used on itself to make its build reproducible -->
       <plugin>
         <groupId>${project.groupId}</groupId>
         <artifactId>${project.artifactId}</artifactId>
-        <version>${reproducible-build-maven-plugin.prevversion}</version>
+        <version>${project.version}</version>
         <executions>
           <execution>
             <id>stripping</id>