check for unicode minus sign in source names

[kelle]

Add code to identify/replace a unicode minus sign with an ascii minus sign.
source_string.replace("\u2212", "-")

This should go in the ingest_names and ingest_source functions.

[kelle]

Other unicode characters to think about:
https://github.com/SIMPLE-AstroDB/SIMPLE-db/blob/adb1d3257efdc099e2195af706171c0e93d70aac/tests/test_integrity.py#L661

[kelle]

also ("\\u2013", "-") and ("\\u2014", "-")