module 'keri.core.coring' has no attribute 'Salter'

[shanfeng9001]

An error occurred when calling the following code in Signifypy.
client = SignifyClient(passcode=bran, tier=tier, url=url)

The error message is:
module 'keri.core.coring' has no attribute 'Salter'

After retrieval, it was found that among all versions of Keripy, the definition of "Salter" only exists in keripy/src/keri/core/signing.py.

In any version, the definition of "Salter" in "coring" has not been found.

Thanks for your help!

[kentbull]

This was addressed in #116