WAF 2020-Rule revisions

Number of APIs: 2

1. List revisions for a rule GET {{fastly_url}}/waf/rules/{{waf_rule_id}}/revisions?include&page[number]&page[size]

2. Get a revision of a rule GET {{fastly_url}}/waf/rules/{{waf_rule_id}}/revisions/{{waf_rule_revision_number}}?include