formattedDate is not declared

[JustGoscha]

Hey there!

Whatever version is published now on npm doesn't have the var in front of formattedDate which is leading to issues.

see here

I don't know why. Because it does have it in the code in this repository. So something must have gone wrong when publishing that version. But it leads for example my pino-papertrail to fail with:

ReferenceError: formattedDate is not defined
    at generateDate (***/node_modules/glossy/lib/glossy/produce.js:376:5)

I guess this commit:
734b9c8
never made it out into a published package