Fix #23 by making sure CD event type names are unique

Author: zaza

src/main/java/dev/cdevents/constants/CDEventConstants.java

@@ -165,7 +165,7 @@ public enum CDEventTypes {
         /**
          * Artifact published event.
          */
-        ArtifactPublishedEvent("dev.cdevents.artifact.packaged." + VERSION),
+        ArtifactPublishedEvent("dev.cdevents.artifact.published." + VERSION),
         /**
          * Artifact created event.
          */

src/test/java/dev/cdevents/constants/CDEventTypesTest.java

@@ -0,0 +1,14 @@
+package dev.cdevents.constants;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+import dev.cdevents.constants.CDEventConstants.CDEventTypes;
+
+public class CDEventTypesTest {
+	@Test
+	void eventTypeNamesAreUnique() {
+		assertThat(CDEventTypes.values()).extracting(CDEventTypes::getEventType).doesNotHaveDuplicates();
+	}
+}

src/test/java/dev/cdevents/constants/package-info.java

@@ -0,0 +1,17 @@
+/**
+ * Copyright 2022-Present https://cdevents.dev/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package dev.cdevents.constants;