Release 0.162.0

Enhancements to jsonpointer

• The jsonpointer functions get, add, add_if_absent, and replace
  have an additonal overload with a create_if_missing parameter. If
  passed true, creates key-object pairs when object keys are missing.

Enhancements to jsonpath

• Improved syntax checking for JSONPath unions
• Simplified function signatures for make_expression, json_query, and json_replace.

Changes:

• The jsonpointer function insert has been deprecated and renamed to add_if_absent,
  for consistency with the other names.