Upgrade ID3C to be able to use the new-style REDCap env var

This was an oversight that should have been part of "Switch to new-style
env vars for REDCap API credentials" (e5e78be).  It happened because I
tested those changes by using a different ID3C install instead of the
Pipenv-one managed here.

It was near impossible to get Pipenv to cooperate in just upgrading ID3C
without upgrading a ton of other stuff (like Datasette) that I don't
want to vette right now.¹  These changes were the result of `pipenv lock
--keep-outdated`.  They don't touch any of our existing deps except
ID3C, but I'm also pretty sure this is still not a minimal upgrade set:
some of these newly added transitive deps, like sqlite-fts4, are clearly
for newer Datasette versions, even though Datasette itself is not
upgraded.  Hopefully my PRs for ditching Pipenv in favor of pip-tools
will merge soon and this will be moot anyway.

¹ pypa/pipenv#2665