v1.1.0

• Fix typo in Tolerance1 constant name; deprecate the old constant (96553ed)
• Allow unwrapping RelHumidity to float64 (d2b7712)
• Add input-range-validating variants of wind chill calculation functions (256d923)
• Add wet-bulb calculation for sea-level pressure given dry-bulb temperature & relative humidity (bdf198a)
• Add heat index calculations & warning levels (97c58a8)

Full Changelog: v1.0.1...v1.1.0