[file_packager.py] Convert fetchRemotePackage to promise#24892
Closed
lkwinta wants to merge 3 commits intoemscripten-core:mainfrom 
Closed
[file_packager.py] Convert `fetchRemotePackage` to promise#24892lkwinta wants to merge 3 commits intoemscripten-core:mainfrom 
lkwinta wants to merge 3 commits intoemscripten-core:mainfrom