- to make it work, I changed how GetEndPosition works as well:
  - instead of specifically looking for the end of a json object/array, it's
    looking for the first non-whitespace character. This may have unexpected
	side-effects on other functions.

- only have a limited set of test for jsonDelete at the moment.

NOTE: timestamps, dates, and times are converted to numbers in FileMaker's
own internal number format. This is useful for parsing within FileMaker,
but not useful for interacting with other services that expect a standard
format like YYYY-MM-DD.
Currently, you must manually convert timestamps, dates, and times to
whatever standard format you need, if sending the JSON to a different
system that expects a particular format.