• implement "try" and "only" as replacements for "lib"
  
• make 'use Math::BigInt lib => "foo"' warn if foo cannot be loaded and a
  fallback occurs
  
• fix bug #21446 - Docs/code inconsistency for bnorm() method
  
• fix bug #21964 - A patch to include a rounding mode of 'common'
  
• fix bug #21445 - Documentation error for exponent() method
  
• fix bug perl #41050 - NaN returned when raising integer value to negative
  power
  
• add from_hex(), from_oct(), and from_bin()
  
• add as_oct()