GeographicLib 2.1.1 (released 2022-07-25)

Changes between 2.1.1 (released 2022-07-25) and 2.1 versions:

• The Planimeter utility used to accept polygon vertices as UTM/UPS
  or MGRS coordinates. However, since these are converted to
  latitude and longitude using the WGS84 ellipoid, this convention
  is incompatible with the -e option to specify the ellipsoid. So
  now, you have to provide the --geoconvert-input option to allow
  vertices to be specified in this way.

• Fix sign error in DST::refine.

• Relax overly strict convergence test for inverse problem in
  Geodesic and GeodesicExact.

• Minor:

  • Use lookup table for selecting number of points for DST in
    GeodesicExact.
  • Relax one of the test thresholds in geodtest.cpp.