fix: upgrade org.apache.maven:maven-plugin-api from 3.0 to 3.8.4

Snyk has created this PR to upgrade org.apache.maven:maven-plugin-api from 3.0 to 3.8.4.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.apache.maven/maven-plugin-api/

See this project in Snyk:
https://app.snyk.io/org/salesforce-oss/project/30768232-4be9-480f-9a4e-49781a0b6912?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

canteen/canteen-maven-plugin/pom.xml

@@ -30,7 +30,7 @@
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-plugin-api</artifactId>
-            <version>3.0</version>
+            <version>3.8.4</version>
         </dependency>
 
         <dependency>