did-core maintenance change base58 to multibase

[manicprogrammer]

per commit 47909f6 in the did-core repo publickeybase58 has been changed to publickeymultibase. Adjust the entities accordingly. This should involve:

Add:

• publickeymultibase entity and connections

Delete:

• base58 connection from did-core

Note: base58 is also currently a depends connection from did-method-peer. Check did-method-peer to see if it still relies on base58. This may be a non-issue when referencing this issue with issue #46 as when did-method-peer is moved to non-core in #46 it's connections will be removed and it will be made the end of the chain of connections.

[manicprogrammer]

#46 was applied prior to this issue thus the remove of the base58 connection will leave base58 orphaned and thus to be a deleted entity as part of this issue.

[manicprogrammer]

multibase was already a references connection from did-core. To fulfill this issue only Base58 entity and connection needed removed.

[manicprogrammer]

published to v1.4.6