fixed a formatter bug with the timezone offset not doing two digits
fixed a formatter bug with the timezone offset not doing two digits

adamjernst/iso8601parser,realestate-com-au/iso8601parser,realestate-com-au/iso8601parser,mindsnacks/iso8601parser,adamjernst/iso8601parser,realestate-com-au/iso8601parser,mindsnacks/iso8601parser