Working on fixing ISO8601 parsing

[ciozi137]

• optional fractional seconds
• optional timezone
• Time without date
• add test string files from https://ijmacd.github.io/rfc3339-iso8601/

@francois-normandin this version is parsing more variants but is probably still incomplete

[ciozi137]

@francois-normandin Change summary:

ISO8601 DateString to Timestamp.vi: UTC Date-Time Case:

ISO8601 DateString to Timestamp.vi: ISO Time Case:

Timestamp to ISO8601 Time.vi

• a new method called by DateTime.ISO8601.lvclass:toString.vi

Test Files

• add test files from RFC 3339 vs ISO 8601

Test ISO8601 DateTime Strings.vi:

[francois-normandin]

Thanks @ciozi137 !
I'll probably review this in a couple weeks, so don't be alarmed by my silence in the coming days...

[ciozi137]

hey @francois-normandin no problem - understood!