RFC-3339 Allow The Option of 'T' or space for Date Time.

[HunterEl]

Hi There!

I have been using your library for about a year now and it has been fantastic. Thank you. I have been working with a team that would like to use a space instead of a T for the Date Time format. If you look at the RFC-3339 section 5.6 and the NOTE at the bottom of the page:

NOTE: ISO 8601 defines date and time separated by "T".
Applications using this syntax may choose, for the sake of
readability, to specify a full-date and full-time separated by
(say) a space character.

The file you have for parsing and validation date time for JSON Schema requires a T and does not allow for the option a space. I will submit a PR under this issue number and you can let me know if that works for the direction of your project. It is a minor change to the file src/JsonSchema/Rfc3339.php where the regular expression needs to be modified and the date format needs to be altered.

cheers!

[erayd]

Fine with me - thanks for the PR :-). I'll take a look at that now.

[bighappyface]

Closed with #415