v2.2.0

• Add %q directive for quarter of the year as a decimal number. Thanks, @jheer!
• Fix off-by-one error formatting %U when the year starts with Sunday. #62
• Fix off-by-one error formatting %W when the year starts with Monday. #62
• Fix off-by-one error parsing week and weekday numbers with utcParse.
• Fix string coercion of specifier passed to utcParse.
• Fix parsing of %L or %f in conjunction with %s. #60
• Add sideEffects: false to the package.json. Thanks, @stof!