v0.9.5

Two pan inertia fixes in usePanZoom, so GraphCanvas and MapCanvas drags settle when they look settled.

Fixed

• usePanZoom — a drag held still and then released no longer flings
  (#321). The release velocity came from the last pointermove, however
  long ago it was, so a drag that had come to rest still glided on release. It is now the
  average over the last 100 ms before the release, counting time the pointer was held still: a
  100 ms hold gives no glide, and a slowdown just before the release gives a gentler one.
• usePanZoom — an inertia glide now ends when it visibly stops
  (#320). It ran until the speed fell below 0.1 px/s, about a second of
  sub-pixel creep after the view looked still, which delayed the 'end' gesture phase and so
  GraphCanvas's onViewportDwell (about 4.6 s after a flick with dwellMs 1500). The glide
  now ends once under half a pixel of travel is left; a 2000 px/s flick ends after about 2.3 s
  instead of 3.2 s, and the view comes to rest within half a pixel of where it did before.