make isUnboundRelationship private (#1234)

UnboundRelationship is a class a user will never see, so there's no need to inform them about a function related to it.

Author: MaxAake

packages/core/src/graph-types.ts

@@ -349,6 +349,7 @@ Object.defineProperty(
  * Test if given object is an instance of {@link UnboundRelationship} class.
  * @param {Object} obj the object to test.
  * @return {boolean} `true` if given object is a {@link UnboundRelationship}, `false` otherwise.
+ * @access private
  */
 function isUnboundRelationship<
     T extends NumberOrInteger = Integer,

packages/neo4j-driver-deno/lib/core/graph-types.ts

@@ -349,6 +349,7 @@ Object.defineProperty(
  * Test if given object is an instance of {@link UnboundRelationship} class.
  * @param {Object} obj the object to test.
  * @return {boolean} `true` if given object is a {@link UnboundRelationship}, `false` otherwise.
+ * @access private
  */
 function isUnboundRelationship<
     T extends NumberOrInteger = Integer,