The 1.1.0 release of uint256 contains some improvements and new features.

• The function MulOverflow was added (https://github.com/holiman/uint256/pull/75 and https://github.com/holiman/uint256/pull/76)
• Squaring, multiplication and expontentiation was improved with 15-20% (https://github.com/holiman/uint256/pull/71)
• EncodeRLP method was added (https://github.com/holiman/uint256/pull/74)
• The SetBytes-method was improved by an order of magnitude, and the extremely fast specialized methods SetBytes1, SetBytes2 etc were added (https://github.com/holiman/uint256/pull/70).
• Compatibility with golang-1.12 was fixed (https://github.com/holiman/uint256/pull/72)
• Tests are now also run on big-endian architecture (https://github.com/holiman/uint256/pull/73)