Critical Failure when empty `tel.params` `dict` when calling `get_phone_numbers`

[bdrolet]

Issue

If an empty dict exists for tel.params in https://github.com/nbeaver/vcard2csv/blob/87649422a72e8d0c338f561efb931b779bb01f4a/vcard2csv.py#L34-L35

        elif vCard.version.value == '3.0':
            if 'CELL' in tel.params['TYPE']:

Traceback (most recent call last):
  File "/Users/ben/src/vcard2csv/vcard2csv.py", line 163, in <module>
    main()
  File "/Users/ben/src/vcard2csv/vcard2csv.py", line 159, in main
    vcard_info = get_info_list(vcard, vcard_path)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ben/src/vcard2csv/vcard2csv.py", line 63, in get_info_list
    cell, home, work = get_phone_numbers(vCard)
                       ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ben/src/vcard2csv/vcard2csv.py", line 37, in get_phone_numbers
    if 'CELL' in tel.params['TYPE']:
                 ~~~~~~~~~~^^^^^^^^
KeyError: 'TYPE'

FIx

Add a check for empty dict

elif vCard.version.value == '3.0':
            if not tel.params:
                continue
            if 'CELL' in tel.params['TYPE']: