Requires github.com/google/jsonschema-go v0.2.1 which is not released

[besmiralia]

Not sure if this is a problem, but the go.mod references github.com/google/jsonschema-go v0.2.1, but when I visit the package registry https://pkg.go.dev/github.com/google/jsonschema-go?tab=versions
there is no v0.2.1

In my enterprise environment, this is causing a checksum mismatch.

[jba]

It's actually referencing an unreleased pseudo-version, not v0.2.1. But I will make a v0.2.1 now.

[jba]

Fixed by #435.