change bolt vesion to go.etcd.io/bbolt 1.3.7

[zhaojizhuang]

Related #61

[br0xen]

It looks like this pull request is adding in several other unused dependencies and downgrading the golang.org/x/sys version... Is there a reason for that that I'm just not seeing or don't know about?

[zhaojizhuang]

@br0xen sorry, my fault. I have deleted golang.org/x/sys v0.6.0 and auto go mod tidy generated golang.org/x/sys v0.4.0 。 And it has been updated to golang.org/x/sys v0.8.0 according to https://github.com/etcd-io/bbolt/blob/master/go.mod#L11

[zhuangqh]

works for me, thanks