Merge pull request #2 from swiftwasm/updateMacAndiOSVersion

cleanup

bump min versions for macOS to 10.15 and iOS to 13

Fix release builds for xcode 16.3 / Swift 6.1 by making WebWorkerCallDecoder/Encoder `final`

Update JSValueEncoder.swift for Swift 6.1

Create README.md

fix failing assertion when compiling with swift-wasm-5.9 snapshot

Allow re-using existing DA instances

Fix nested encoder container for Codable enums

Initial Commit

Create LICENSE