Move from delta-standalone to delta-kernel

[tmnd1991]

While working on #222, I realised delta-standalone (latest version 3.1.0) supports only very basic delta capabilities:

io.delta.standalone.internal.exception.DeltaErrors$InvalidProtocolVersionException: 
Delta protocol version (3,7) is too new for this version of Delta
Standalone Reader/Writer (1,2). Please upgrade to a newer release.

delta-standalone is deprecated in favour of delta-kernel, therefore I think we should move to delta-kernel to have support of more recent features.

[tmnd1991]

After some preliminary work, as of version 3.1.0, delta-kernel as such a small limited set of features which makes the change a step backward instead of a step forward.