Provide spec filter
Add test for DateTime.getDaysInMonth
Remove duplicate declaration of DateTime.prototype.getDaysInMonth
Add fail fast validation
Introduce sequence and curry functions for tests
Use curry function
Make sequence 1 bigger allready in definition
Add test for getDayInYear
Replace undefined with place holder symbol
Fix curry implementation to support frequent calls
Add test for getDayInYear
Simplify getDaysInMonth algorithm
Simplify getDayInYear implementation
Introduce DateTime.fromDate
Make fromIsoDate and fromIsoDateTime strict
Extract test utils to separate file
Provide milliseconds also for DateTime constructor
Add withResetMS method to DateTime
Add toISOString to DateTime
Remove redundant DAYS_IN_MONTH field from DateTime