Shiny new things and better old things.
- Various API and non-API changes (0.y.z)
- #84 Improve: arbitrary integer multiplication
- #83 Add: BinaryInteger/factorial()
- #82 A more number-y Signum
- #81 Improve: TextInt
- #80 Add: BinaryInteger/negate()
- #79 Hoist GCD, XGCD, and remove unsigned constraint
- #76 Add: BinaryInteger/isqrt()
- #75 Generic two-way comparisons
- #74 Add: Interoperable
- #73 Using Randomness in Stdlib methods
- #72 Generic exponent in BinaryInteger/power(_:)
- #71 Free multiplication in BinaryInteger/power(_:)
- #70 Add: Division/exactly()
- #66 Miscellaneous 0.9.0 stuff
- #64 Divider21<T>
- #63 Division by constant in TextInt
- #62 Protocol: Guarantee