Merge pull request #514 from graphql-java-kickstart/renovate/jackson.version

Update jackson.version to v2.12.3

Author: oryan-block

pom.xml

@@ -16,7 +16,7 @@
         <java.version>1.8</java.version>
         <kotlin.version>1.4.21</kotlin.version>
         <kotlin-coroutines.version>1.4.2</kotlin-coroutines.version>
-        <jackson.version>2.10.3</jackson.version>
+        <jackson.version>2.12.3</jackson.version>
         <graphql-java.version>16.2</graphql-java.version>
 
         <maven.compiler.source>${java.version}</maven.compiler.source>