upgrade: murmurhash
upgrade: murmurhash

replace murmurhash-net-core and murmurhash-net (1.0.0) with murmhash (1.0.2) which is compatible with both net461 and .net standard 1.6.

License: MIT
Signed-off-by: Trond Bråthen <24909d0abdb726efcd9db31fa5847f85688f140f@gmail.com>
multiformats/cs-multihash,multiformats/cs-multihash