Bump org.snakeyaml:snakeyaml-engine from 2.8 to 2.9 (#191)

Bumps [org.snakeyaml:snakeyaml-engine](https://bitbucket.org/snakeyaml/snakeyaml-engine) from 2.8 to 2.9.
- [Commits](https://bitbucket.org/snakeyaml/snakeyaml-engine/branches/compare/snakeyaml-engine-2.9..snakeyaml-engine-2.8)

---
updated-dependencies:
- dependency-name: org.snakeyaml:snakeyaml-engine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

pom.xml

@@ -98,7 +98,7 @@
     <dependency>
       <groupId>org.snakeyaml</groupId>
       <artifactId>snakeyaml-engine</artifactId>
-      <version>2.8</version>
+      <version>2.9</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>