Fix wrong import name
Polish release notes
v1.000004

 [00 Trivial]
 - Minor documentation fixes.

 [Dependencies::Stats]
 - Dependencies changed since 1.000003, see misc/*.deps* for details
 - develop: +1 (suggests: ↑1)

 [Documentation]
 - misnamed heading, thanks to Michał Wojciechowski (GH #14)

 [Metadata]
 - new contributor.
post-release cleanup