v2.1.0

Changes

• export Duration interface
• test logic against @js-temporal/polyfill
• update how weeks are handled (now supported to mix with Y/M/D)
• throw RangeError on invalid input to parse (["", "P", "PT", "PT0.5H0.5S"]) etc
• fixes use of fractional hours/minutes in toSeconds

Commits

• Test code against @js-temporal/polyfill (#27) c267a35
• Export Duration interface (#29) d06b888

v2.0.0...v2.1.0