* update go version
* update go version
* format code by goimports
* format code by goimports
* go mod tidy
* update go version
* update go version
* upgrade linter
* add exclude rule
* fix golangci exclude
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Co-authored-by: vincent <419436363@qq.com>
Co-authored-by: HAOYUatHZ <37070449+HAOYUatHZ@users.noreply.github.com>
This PR adds re-written difficulty calculators, which are based on uint256. It also adds a fuzzer + oss-fuzz integration for the new fuzzer. It does differential fuzzing between the new and old calculators.
Note: this PR does not actually enable the new calculators.