Update go version to 1.22.2 and add go-cmp dependency

[catatsuy]

This pull request primarily updates the Go version and modifies the dependencies in the go.mod file. The Go version is updated from 1.19 to 1.22.2. The dependency github.com/google/go-cmp is moved from an indirect requirement to a direct one, while the indirect requirement for golang.org/x/sys is retained.

Here's the key change:

• go.mod: Updated the Go version from 1.19 to 1.22.2. Moved github.com/google/go-cmp from an indirect requirement to a direct one, and retained golang.org/x/sys as an indirect requirement.