Linux & Windows support #15
Description
Add support for Linux and Windows platforms.
Current blockers:
- Async URLSession methods in Foundation only available in Apple's Foundation (see macOS v11 support #16)
- This is no longer a blocker since we're using
URLSessionDataTaskdirectly now in Flock's internal downloader
- This is no longer a blocker since we're using
- apple/swift-corelibs-foundation doesn't have correct sendable type definitions for
URLSessionrelated classes/structures