feat(js): use buffer instead of text-decoder #485

Job	Run time
Run checks (ubuntu-latest)	4m 18s
Run checks (macos-latest)	6m 16s
Run checks (windows-latest)	7m 27s
Run tests (ubuntu-latest)	5m 43s
Run tests (macos-latest)	6m 25s
Run tests (windows-latest)	6m 5s
Build library (iOS) (aarch64-apple-ios)	5m 50s
Build library (iOS) (aarch64-apple-ios-sim)	8m 2s
Build library (iOS) (x86_64-apple-ios)	4m 59s
Build library (Android) (aarch64-linux-android)	7m 39s
Build library (Android) (armv7-linux-androideabi)	8m 9s
Build library (Android) (i686-linux-android)	7m 30s
Build library (Android) (x86_64-linux-android)	8m 19s
Build library (linux-aarch64, ubuntu-latest, libaries_askar.so, aarch64-unknown-linux-gnu, true)	8m 41s
Build library (linux-x86_64, ubuntu-latest, libaries_askar.so, x86_64-unknown-linux-gnu, true)	8m 10s
Build library (darwin-universal, macos-latest, libaries_askar.dylib, darwin-universal, beta)	2m 49s
Build library (windows-x86_64, windows-latest, aries_askar.dll, x86_64-pc-windows-msvc)	7m 48s
Create library (Android)	5s
Create iOS xcframework	1s
Create iOS and Android release assets	1s
Build and test JavaScript wrapper	1s
Build and test Python wrapper	1s
	1h 54m 19s

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