Bump org.apache.thrift:libthrift from 0.20.0 to 0.21.0

Bumps [org.apache.thrift:libthrift](https://github.com/apache/thrift) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/apache/thrift/releases)
- [Changelog](https://github.com/apache/thrift/blob/master/CHANGES.md)
- [Commits](apache/thrift@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: org.apache.thrift:libthrift
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -76,7 +76,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <shade.prefix>shaded.parquet</shade.prefix>
     <thrift.executable>thrift</thrift.executable>
-    <thrift.version>0.20.0</thrift.version>
+    <thrift.version>0.21.0</thrift.version>
     <thrift-maven-plugin.version>0.10.0</thrift-maven-plugin.version>
   </properties>