PROJ 5.2.0

This release includes both new features and bug fixes in PROJ

UPDATES

• Added support for deg, rad and grad in unitconvert (#1054)

• Assume +t_epoch as time input when not otherwise specified (#1065)

• Added inverse Lagrange projection (#1058)

• Added +multiplier option to vgridshift (#1072)

• Added Equal Earth projection (#1085)

• Added "require_grid" option to gie (#1088)

• Replace +transpose option of Helmert transform with +convention.
  From now on the convention used should be explicitly written. An
  error will be returned when using the +transpose option (#1091)

• Improved numerical precision of inverse spherical Mercator projection (#1105)

• cct will now forward text after coordinate input to output stream (#1111)

BUG FIXES

• Do not pivot over WGS84 when doing cs2cs-emulation with geocent (#1026)

• Do not scan past the end of the read data in pj_ctx_fgets (#1042)

• Make sure proj_errno_string() is available in DLL (#1050)

• Respect +to_meter setting when doing cs2cs-emulation (#1053)

• Fixed unit conversion factors for geod (#1075)

• Fixed test failures related to GCC 8 (#1084)

• Improved handling of +geoc flag (#1093)

• Calculate correct projection factors for Webmercator (#1095)

• cs2cs now always outputs degrees when transformed coordinates are
  in angular units (#1112)