Bump org.openrefine:main from 3.8.7 to 3.9.0

Bumps [org.openrefine:main](https://github.com/OpenRefine/OpenRefine) from 3.8.7 to 3.9.0.
- [Release notes](https://github.com/OpenRefine/OpenRefine/releases)
- [Commits](OpenRefine/OpenRefine@3.8.7...3.9.0)

---
updated-dependencies:
- dependency-name: org.openrefine:main
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <properties>
-    <openrefine.version>3.8.7</openrefine.version>
+    <openrefine.version>3.9.0</openrefine.version>
     <!-- Change the values below, as well as the groupId & url, to reflect your extension -->
     <extension.id>openrefine-files-extension</extension.id>
     <extension.name>OpenRefine Files Extension</extension.name>