Bump dependencies

[MrDOS]

At risk of burying the lede, the important change here is bumping golang.org/x/sys, because this adds native support for Darwin on ARM64. With the old version, building on an Apple Silicon Mac fails:

$ go build ./cmd/...
# golang.org/x/sys/unix
../../go/pkg/mod/golang.org/x/[email protected]/unix/syscall_darwin.1_13.go:25:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.1_13.go:27:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.1_13.go:40:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:28:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:43:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:59:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:75:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:90:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:105:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:121:3: //go:linkname must refer to declared function or variable
../../go/pkg/mod/golang.org/x/[email protected]/unix/zsyscall_darwin_arm64.go:121:3: too many errors

With this new version, the build succeeds, and produces a useful executable.

While I was making this change anyway, I thought it would be useful to attempt to bump other dependencies.

• This meant resolving a minor breaking change in github.com/ekzhu/minhash-lsh.
• I also wasn't able to bump gonum.org/v1/gonum past v0.8.2 because of a breaking change in v0.9.0. See the commit message of f4552ce959319c9bf0da4475678457fd317a98f2 for details.