chore(deps): update dependency io.cloudevents:cloudevents-api to v3 (#268)

Co-authored-by: Jeremy Fehr <[email protected]>

Author: renovate-bot

functions-framework-api/pom.xml

@@ -52,7 +52,7 @@
     <dependency>
       <groupId>io.cloudevents</groupId>
       <artifactId>cloudevents-api</artifactId>
-      <version>2.5.0</version>
+      <version>3.0.0</version>
     </dependency>
   </dependencies>