fix: upgrade com.google.code.gson:gson from 2.8.8 to 2.8.9

Snyk has created this PR to upgrade com.google.code.gson:gson from 2.8.8 to 2.8.9.

See this package in Maven Repository:
https://mvnrepository.com/artifact/com.google.code.gson/gson/

See this project in Snyk:
https://app.snyk.io/org/micah.silverman/project/cb87a9f4-731e-4a75-a25d-ca3272fdd00b?utm_source=github&utm_medium=referral&page=upgrade-pr

pom.xml

@@ -76,7 +76,7 @@
 
         <jackson.version>2.12.6</jackson.version>
         <orgjson.version>20180130</orgjson.version>
-        <gson.version>2.8.8</gson.version>
+        <gson.version>2.8.9</gson.version>
 
         <!-- Optional Runtime Dependencies: -->
         <bouncycastle.version>1.67</bouncycastle.version>