add jackson-core for the missing com.fasterxml.jackson.core.exc.StreamWriteException

Author: vladak

opengrok-indexer/pom.xml

@@ -189,6 +189,11 @@ Portions Copyright (c) 2020-2020, Lubos Kosco <[email protected]>.
             <artifactId>jakarta.activation-api</artifactId>
             <version>2.0.1</version>
         </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>