0.0.4

IMPORTANT: Prevents an issue where the FirestoreUuidTable could overwrite existing phone number <-> uuid mappings with a new uuid. All users should upgrade immediately.

• Applies an emergency fix to the FirestoreUuidTable to prevent it overwriting existing uuids. In instances where it would previously have overwritten a uuid, it now crashes instead #21). A more performant, more reliable fix will come in a future release.
• Adds de_identify_csv.py, which takes a CSV containing a column of phone numbers and replaces the phone numbers with uuids (#20).