Bump h2 from 2.0.206 to 2.1.210 in /helper-dependencies

Bumps [h2](https://github.com/h2database/h2database) from 2.0.206 to 2.1.210.
- [Release notes](https://github.com/h2database/h2database/releases)
- [Commits](h2database/h2database@version-2.0.206...version-2.1.210)

---
updated-dependencies:
- dependency-name: com.h2database:h2
  dependency-type: direct:production
...

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

helper-dependencies/pom.xml

@@ -27,7 +27,7 @@
         <guava.version>30.0-jre</guava.version>
         <guice.version>4.1.0</guice.version>
         <gson.version>2.8.9</gson.version>
-        <h2.version>2.0.206</h2.version>
+        <h2.version>2.1.210</h2.version>
         <hikaricp.version>3.4.5</hikaricp.version>
         <!-- deprecated since 2.1 in favor of "jackson-bom.version" -->
         <jackson.version>2.10.5.20201202</jackson.version>