Bump the version to 0.3.0

Author: vy

CHANGELOG.adoc

@@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 ////
 
-== 0.x.x
+== 0.3.0 (2023-03-14)
 
 * Upgrade the compiler version to Java 17, yet still target Java 8
 

pom.xml

@@ -55,7 +55,7 @@
   <properties>
 
     <!-- project version -->
-    <revision>0.3.0-SNAPSHOT</revision>
+    <revision>0.3.0</revision>
 
     <!-- `minimalJavaBuildVersion` is employed by `org.apache:apache`, which is the parent of `org.apache.logging:logging-parent`, which is the parent of us.
          `minimalJavaBuildVersion` is used for enforcing the compiler version.