update sources for wxpython4

Problem: After update to conda=4.7.5 the earliest version of wxpython in conda channels is 4.0.1.
wxpython 3 can be installed manually with

conda install -c anaconda wxpython=3

but this is a last-resort workaround and is not viable longer term.

Solution: Update PDFgui sources to work with wxpython 4.

@dragonyanglong

@dragonyanglong - can you please take on this one?
cc: @sbillinge

Sure!

TLDR - old packages can be re-enabled with a penalty of slower installation

conda config --set restore_free_channel true

Navigation Menu