Bump annotations from 20.1.0 to 21.0.0

Bumps [annotations](https://github.com/JetBrains/java-annotations) from 20.1.0 to 21.0.0.
- [Release notes](https://github.com/JetBrains/java-annotations/releases)
- [Changelog](https://github.com/JetBrains/java-annotations/blob/master/CHANGELOG.md)
- [Commits](JetBrains/java-annotations@20.1.0...21.0.0)

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

Author: dependabot[bot]

pom.xml

@@ -75,7 +75,7 @@
         <dependency>
             <groupId>org.jetbrains</groupId>
             <artifactId>annotations</artifactId>
-            <version>20.1.0</version>
+            <version>21.0.0</version>
         </dependency>
 
         <!-- Unit tests -->