Sharedown 4.2.1

• Windows: fix download (#36)
• Update all dependancies

Windows portable executable requires a few more seconds to start, if you want something faster, use the installer.

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sha256sum

8271f7bd5bbe8bd6e45cba55ad329530c26d60167d910d5e9b9e9d86ed7aaaf1  sharedown-4.2.1-arm64.dmg
bb2397b2bb9a01b765884d7af5fe40560f50a180c1c4532c9e74079f1da0e6c4  sharedown-4.2.1.dmg
0a31de1983c2fc7e2cce42146da73be6a86f9bcb11e9ca8db153ebcb1dd9cd0b  sharedown 4.2.1 portable.exe
8a0a580945291cc18d9825cb360830307a4d4956f291a5490bb415206db2c606  sharedown Setup 4.2.1.exe
d42d6e5582805df1ac889e7738defce7f4b460de49da0a4326385f31f90c0897  sharedown-4.2.1.AppImage