update checkout and upload-artifact to v3
tree27a8e60943cd66b59b24ddc327ceb6b008a78368
drwxr-xr-x - .github
-rw-r--r-- 118 .gitignore
-rw-r--r-- 306 .gitmodules
-rw-r--r-- 713 .travis.yml
-rw-r--r-- 1040 CMakeLists.txt
-rw-r--r-- 540 Doxyfile.in
-rw-r--r-- 1470 LICENSE
-rw-r--r-- 4799 README.md
-rw-r--r-- 1321 SCR-mfgtools.txt
-rw-r--r-- 5833 appveyor.yml
m--------- - bzip2
m--------- - libusb
drwxr-xr-x - libuuu
drwxr-xr-x - msvc
drwxr-xr-x - snap
drwxr-xr-x - uuu
m--------- - zlib
m--------- - zstd