sources: replace HttpartyCache with Danbooru::Http.

app/logical/pixiv_api_client.rb

@@ -169,19 +169,19 @@ class PixivApiClient
     }
 
     url = "https://public-api.secure.pixiv.net/v#{API_VERSION}/works/#{illust_id.to_i}.json"
-    body, code = HttpartyCache.get(url, headers: headers, params: params)
-    json = JSON.parse(body)
+    response = Danbooru::Http.cache(1.minute).headers(headers).get(url, params: params)
+    json = response.parse
 
-    if code == 200
+    if response.code == 200
       WorkResponse.new(json["response"][0])
     elsif json["status"] == "failure" && json.dig("errors", "system", "message") =~ /対象のイラストは見つかりませんでした。/
       raise BadIDError.new("Pixiv ##{illust_id} not found: work was deleted, made private, or ID is invalid.")
     else
-      raise Error.new("Pixiv API call failed (status=#{code} body=#{body})")
+      raise Error.new("Pixiv API call failed (status=#{response.code} body=#{response.body.to_s})")
     end
 
   rescue JSON::ParserError
-    raise Error.new("Pixiv API call failed (status=#{code} body=#{body})")
+    raise Error.new("Pixiv API call failed (status=#{response.code} body=#{response.body.to_s})")
   end
 
   def fanbox(fanbox_id)