Got 404 when validating with `-v`

~~~plain
$ kubeval --version
Version: 0.10.0
Commit: bc9ab56cc345f67265b8fb01b03489170fd0e504
Date: 2019-06-09T17:38:35Z
~~~

~~~plain
$ kubeval test.yaml -v 1.7.0
1 error occurred:
* Failed initalizing schema https://kubernetesjsonschema.dev/v1.7.0-standalone/service-v1.json: Could not read schema from HTTP, response status is 404 Not Found
~~~

~~~yaml
apiVersion: v1
kind: Service
metadata:
name: sleep
labels:
app: sleep
spec:
ports:
- port: 80
name: http
selector:
app: sleep
~~~