rswag - Fix deprecations

spec/swagger_helper.rb

@@ -14,7 +14,7 @@
   # By default, the operations defined in spec files are added to the first
   # document below. You can override this behavior by adding a swagger_doc tag to the
   # the root example_group in your specs, e.g. describe '...', swagger_doc: 'v2/swagger.json'
-  config.swagger_docs = {
+  config.openapi_specs = {
     'v1/swagger.yaml' => {
       openapi: '3.0.1',
       info:    {
@@ -29,5 +29,5 @@
   # The swagger_docs configuration option has the filename including format in
   # the key, this may want to be changed to avoid putting yaml in json files.
   # Defaults to json. Accepts ':json' and ':yaml'.
-  config.swagger_format = :yaml
+  config.openapi_format = :yaml
 end

swagger/v1/swagger.yaml

@@ -0,0 +1,6 @@
+---
+openapi: 3.0.1
+info:
+  title: API V1
+  version: v1
+paths: {}