Bump to v6.2.1 in CI script

v6.1.0. Support Python 2 and Python 3.

Let the artifact zip it for us.

Enable RTTI for compatibility with Boost.

Attempt to fix:

"C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\build_installer.proj" (rebuild target) (1) ->
"C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\build_output.proj" (Rebuild target) (2) ->
"C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\sdna\sdna_vs2008\sdna_vs2008.sln" (Rebuild target) (3:2) ->
"C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\sdna\sdna_vs2008\sdna_vs2008.vcxproj" (Rebuild target) (4) ->
(Link target) ->
  libboost_thread-vc140-mt-s-x64-1_72.lib(thread.obj) : error LNK2038: mismatch detected for 'boost__type_index__abi':
value 'RTTI is used' doesn't match value 'RTTI is off - typeid() is used only for templates' in calc_output_code.obj [C
:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\sdna\sdna_vs2008\sdna_vs2008.vcxproj]
  C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\sdna\sdna_vs2008\x64\Release\sdna_vs2008.dll : fatal error LNK1319:
1 mismatches detected [C:\Users\drjam\AppData\Local\Temp\sDNA\sdna_plus\sdna\sdna_vs2008\sdna_vs2008.vcxproj]

Remove references to sdna_plus_plus files

Remove copy geos_c.dll from Release config and x64 platform

Remove copy geos_c.dll from Release config and x64 platform

Copy files over from source tree that compiles, without release dirs

Copy files over from source tree that compiles, without release dirs