update to latest fastutil dep

Author: ranade

pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>it.unimi.dsi</groupId>
       <artifactId>fastutil</artifactId>
-      <version>8.1.0</version>
+      <version>8.1.1</version>
     </dependency>
 
     <!-- Test -->