Incorrect handle of value lists

[mihai1voicescu]

According to the RFC:

The default type is "voice". These type parameter values can be
specified as a parameter list (e.g., TYPE=text;TYPE=voice) or as a
value list (e.g., TYPE="text,voice"). The default can be
overridden to another set of values by specifying one or more
alternate values. For example, the default TYPE of "voice" can be
reset to a VOICE and FAX telephone number by the value list
TYPE="voice,fax".

Unfortunately the parse is invalid of such arguments, "text,voice" gets parsed to ["\"text", "voice\""].
For example use:

TEL;VALUE=uri;PREF=1;TYPE="voice,home":tel:+1-555-555-5555;ext=5555

The parser should eliminate the double quotes. I will make a pull request.