Update dependency com.uber.nullaway:nullaway to v0.10.21
diff --git a/jgvariant-parent/pom.xml b/jgvariant-parent/pom.xml
index 3b632bd..5fd3f64 100644
--- a/jgvariant-parent/pom.xml
+++ b/jgvariant-parent/pom.xml
@@ -77,7 +77,7 @@
     <jetbrains-annotations.version>24.1.0</jetbrains-annotations.version>
     <jqwik.version>1.8.2</jqwik.version>
     <junit-jupiter.version>5.10.1</junit-jupiter.version>
-    <nullaway.version>0.10.20</nullaway.version>
+    <nullaway.version>0.10.21</nullaway.version>
     <parsson.version>1.1.5</parsson.version>
     <picocli.version>4.7.5</picocli.version>
     <yasson.version>3.0.3</yasson.version>