Add (half)SipHash implementation

[Entreco]

KMM implementation of (half)SipHash
Let me know your throughts, feedback, suggestions

[robxyy]

Looks great but needs some minor tweaks.

[Entreco]

Thanks for your quick review, much appreciated!
I've pushed the requested tweaks.

I am only able to run the tests on a Windows machine.
No clue if we need additional testing other (native) targets, I'll leave that up to you.

Btw, is it possible to add badges to the README with the supported platforms/targets?
Something like this should work I guess:

![badge-platform-android]
![badge-platform-jvm]
![badge-platform-js]

[robxyy]

I am only able to run the tests on a Windows machine. No clue if we need additional testing other (native) targets, I'll leave that up to you.

Don't worry, Unit-tests passed. See runs

Btw, is it possible to add badges to the README with the supported platforms/targets? Something like this should work I guess:

![badge-platform-android]
![badge-platform-jvm]
![badge-platform-js]

LGTM, currently supports Tier 2

[Entreco]

Do you already know when you would like to publish a new version? No pressure, just curious :)

[robxyy]

@Entreco v0.2.0 has been released and will be pushed to Maven in about 1 hour :)