Bump snakeyaml from 1.29 to 1.31

Bumps [snakeyaml](https://bitbucket.org/snakeyaml/snakeyaml) from 1.29 to 1.31.
- [Commits](https://bitbucket.org/snakeyaml/snakeyaml/branches/compare/snakeyaml-1.31..snakeyaml-1.29)

---
updated-dependencies:
- dependency-name: org.yaml:snakeyaml
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -147,7 +147,7 @@
       <dependency>
         <groupId>org.yaml</groupId>
         <artifactId>snakeyaml</artifactId>
-        <version>1.29</version>
+        <version>1.31</version>
         <scope>test</scope>
       </dependency>