Support Gatsby v4

[Vacilando]

There seems to be a new version that supports Gatsby v4 - @raqystyle / @conradj could you please also publish it via npm?

https://www.npmjs.com/package/gatsby-source-pocket is currently still the old one.

[conradj]

Hey @Vacilando I've published @raqystyle's changes to npm, could you give it a go please?

[Vacilando]

@conradj / @raqystyle unfortunately, there's the following error showing up during develop:

"gatsby-source-pocket" threw an error while running the sourceNodes lifecycle:
RangeError: Invalid time value

0

This exception occurs when the Date object contains an invalid date - see https://stackoverflow.com/questions/54462227/rangeerror-invalid-time-value/54462335#54462335

Could you please have a look at that?

[Vacilando]

Could you reopen this ticket, please?

[Vacilando]

Created a new ticket for this -> #18