Bump version to 3.0.0
Bump version to 3.0.0

Signed-off-by: Rita Zhang <011b71a2d041f8690750f6af12d01fdf9db1e741@gmail.com>

open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper