[patch] appveyor.yml - remove MinGW dll's from mswin testing PATH
At present, the MinGW dll's are in the path for the mswin builds in Appveyor.
I doubt they're an issue for building, but they could result in conflicts during testing. Note that the MSYS2 dll's (in C:\msys64\usr\bin) are all prefixed with
Attached patch removes them.
Passed in my fork at: