Fix X25519 key derivation, bucket registry restore, add derivePublicK… #34

Job	Run time
get-version	4s
build-wasm	6m 50s
build-ios	9m 20s
generate-bindings	6m 6s
build-android (aarch64-linux-android, arm64-v8a, aarch64-linux-android21-clang, llvm-ar)	2m 44s
build-android (armv7-linux-androideabi, armeabi-v7a, armv7a-linux-androideabi21-clang, llvm-ar)	2m 41s
build-android (x86_64-linux-android, x86_64, x86_64-linux-android21-clang, llvm-ar)	2m 47s
publish-pubdev	1m 56s
publish-npm	7s
upload-release-assets	19s
	32m 54s

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