[enh] start graphing from the release date on

[nschloe]

The pepy graph shows all versions as if they had existed forever:

It'd be more instructive if the stats for each version started showing only from its release date on. This way, one could see if software had 0 downloads for a while after its release.

[hugovk]

Would pepy need to query PyPI to get the release dates?

[sethmlarson]

@hugovk Probably to distinguish between 0 downloads and not-yet-released. However I don't think I've seen a single project with zero downloads on release day due to scrapers / mirrors. :)

[psincraian]

I like the idea 👍 As @hugovk mentions this data doesn't come from BigQuery so we need to query PyPI to get it