fix: upgrade org.yaml:snakeyaml from 2.1 to 2.2

Snyk has created this PR to upgrade org.yaml:snakeyaml from 2.1 to 2.2.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.yaml/snakeyaml/

See this project in Snyk:
https://app.snyk.io/org/pkiraly/project/1edd575e-5f6e-416c-b516-e938a0e826df?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

pom.xml

@@ -144,7 +144,7 @@
     <dependency>
       <groupId>org.yaml</groupId>
       <artifactId>snakeyaml</artifactId>
-      <version>2.1</version>
+      <version>2.2</version>
     </dependency>
     <!-- command line interface -->
     <dependency>