feat: adding support for Buffer.isBuffer and Buffer.isEncoding #2169

Job	Run time
check	29s
build (ubuntu-latest, linux, aarch64, nightly) / build aarch64-linux	7m 6s
build (ubuntu-latest, linux, x86_64, nightly) / build x86_64-linux	7m 3s
build (macos-latest, darwin, aarch64, nightly) / build aarch64-darwin	7m 9s
build (macos-latest, darwin, x86_64, nightly) / build x86_64-darwin	7m 8s
build (windows-latest, windows, x86_64, nightly-x86_64-pc-windows-gnu) / build x86_64-windows	7m 1s
modules (macos-latest, darwin, aarch64, stable) / aarch64-darwin	3m 11s
modules (macos-latest, darwin, x86_64, stable) / x86_64-darwin	4m 34s
modules (ubuntu-latest, linux, aarch64, stable) / aarch64-linux	4m 2s
modules (ubuntu-latest, linux, x86_64, stable) / x86_64-linux	4m 22s
modules (windows-latest, windows, x86_64, stable-x86_64-pc-windows-gnu) / x86_64-windows	2m 10s
	54m 15s

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