Revert "[chore] Release 8.2.0 (#683)" (#684)

This reverts commit 80e9640.

Author: lahirumaramba

pom.xml

@@ -19,7 +19,7 @@
 
     <groupId>com.google.firebase</groupId>
     <artifactId>firebase-admin</artifactId>
-    <version>8.2.0</version>
+    <version>8.1.0</version>
     <packaging>jar</packaging>
 
     <name>firebase-admin</name>