Module wrapping

Traits

• WrappingAdd Performs addition that wraps around on overflow.
• WrappingMul Performs multiplication that wraps around on overflow.
• WrappingNeg Performs a negation that does not panic.
• WrappingShl Performs a left shift that does not panic.
• WrappingShr Performs a right shift that does not panic.
• WrappingSub Performs subtraction that wraps around on overflow.