Release v1.1.7

Changelog

• 295103b Add comments on sign methods
• e3fc117 Merge pull request #51 from bitcoin-sv/feature/sign-unsigned
• 69c01ee add fee not computed test
• 8823d79 add sign unsigned and check for uncomputed change
• d2dfdb9 add tests for signunsigned
• f1b38fa add transaction tests
• 7f27c0f additional tx tests
• bd93a7f lint
• 22df593 rename shallowClone to clone, add test for clone
• e028a95 test sign unsigned from new transaction
• 32a4cb2 update changelog