Read Long from String (datetime)

[leosilvadev]

Hello, I had one case in a project where we have some timestamp fields printed as string (we cannot fix that) so when we try to use the Json decoder it fails. Do you think this feature could be added to the readLong function? I mean, to try to parse to one (or more, configurable) datetime formats? I have done some work on this and could open a MR in case you think it is relevant.

Tks