v2.2.0

• Feature: Implement MpZ.asIntN and MpZ.asUintN.
• Feature: Implement #fact.
• Feature: Implement MpZ.random.
• Feature: Implement #isqrt and #iroot.
• Feature: Implement #log2 and #log10.
• Feature: Implement #gcd and #lcm.
• Improvement: Improve #mod performance.
• Improvement: Improve #toHex, #toDecimal performance.
• Improvement: Improve #add and #sub performance.
• Bugfix: Make #not public.