Use current versions of software in Appveyor.
Use current versions of software in Appveyor.

Use Visual Studio 2019
Use Python 3.8
Use Scons 3.1.2

ex/godot,vkbsb/godot,ZuBsPaCe/godot,firefly2442/godot,Valentactive/godot,Shockblast/godot,Shockblast/godot,honix/godot,Paulloz/godot,DmitriySalnikov/godot,MarianoGnu/godot,sanikoyes/godot,Valentactive/godot,akien-mga/godot,Faless/godot,ex/godot,MarianoGnu/godot,DmitriySalnikov/godot,Paulloz/godot,sanikoyes/godot,MarianoGnu/godot,DmitriySalnikov/godot,godotengine/godot,MarianoGnu/godot,pkowal1982/godot,ZuBsPaCe/godot,Valentactive/godot,Zylann/godot,guilhermefelipecgs/godot,Paulloz/godot,vkbsb/godot,honix/godot,Faless/godot,firefly2442/godot,guilhermefelipecgs/godot,akien-mga/godot,vkbsb/godot,guilhermefelipecgs/godot,ex/godot,DmitriySalnikov/godot,sanikoyes/godot,vnen/godot,sanikoyes/godot,Valentactive/godot,DmitriySalnikov/godot,josempans/godot,ZuBsPaCe/godot,vkbsb/godot,vkbsb/godot,vkbsb/godot,guilhermefelipecgs/godot,ex/godot,akien-mga/godot,MarianoGnu/godot,godotengine/godot,akien-mga/godot,Shockblast/godot,vnen/godot,BastiaanOlij/godot,MarianoGnu/godot,BastiaanOlij/godot,ex/godot,pkowal1982/godot,josempans/godot,Faless/godot,Valentactive/godot,Paulloz/godot,Faless/godot,Shockblast/godot,Valentactive/godot,vnen/godot,Shockblast/godot,sanikoyes/godot,vnen/godot,BastiaanOlij/godot,honix/godot,godotengine/godot,ZuBsPaCe/godot,Valentactive/godot,Shockblast/godot,sanikoyes/godot,josempans/godot,ZuBsPaCe/godot,godotengine/godot,firefly2442/godot,Paulloz/godot,Zylann/godot,akien-mga/godot,josempans/godot,josempans/godot,godotengine/godot,josempans/godot,Valentactive/godot,honix/godot,pkowal1982/godot,Faless/godot,MarianoGnu/godot,Paulloz/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,josempans/godot,ZuBsPaCe/godot,Zylann/godot,firefly2442/godot,Paulloz/godot,MarianoGnu/godot,vnen/godot,pkowal1982/godot,akien-mga/godot,sanikoyes/godot,godotengine/godot,firefly2442/godot,Zylann/godot,vkbsb/godot,josempans/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,pkowal1982/godot,BastiaanOlij/godot,Zylann/godot,vkbsb/godot,firefly2442/godot,godotengine/godot,firefly2442/godot,firefly2442/godot,vnen/godot,Shockblast/godot,BastiaanOlij/godot,vnen/godot,honix/godot,BastiaanOlij/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,ex/godot,pkowal1982/godot,Zylann/godot,akien-mga/godot,vnen/godot,BastiaanOlij/godot,BastiaanOlij/godot,sanikoyes/godot,pkowal1982/godot,guilhermefelipecgs/godot,honix/godot,Shockblast/godot,Faless/godot,godotengine/godot,pkowal1982/godot,akien-mga/godot,Faless/godot,ex/godot,Zylann/godot,ex/godot,guilhermefelipecgs/godot,Faless/godot,Zylann/godot