fix: update CloudEvents dependencyFixes GoogleCloudPlatform#378 (GoogleCloudPlatform#379)

Author: akerekes

functions-framework-api/pom.xml

@@ -70,7 +70,7 @@
     <dependency>
       <groupId>io.cloudevents</groupId>
       <artifactId>cloudevents-api</artifactId>
-      <version>4.0.1</version>
+      <version>4.0.2</version>
     </dependency>
   </dependencies>