add missing prismo testcase data

test/fixtures/httpoison_mock/https___prismo.news__mxb.json

@@ -0,0 +1 @@
+{"id":"https://prismo.news/@mxb","type":"Person","name":"mxb","preferredUsername":"mxb","summary":"Creator of △ Prismo\r\n\r\nFollow me at @mb@mstdn.io","inbox":"https://prismo.news/ap/accounts/mxb/inbox","outbox":"https://prismo.news/ap/accounts/mxb/outbox","url":"https://prismo.news/@mxb","publicKey":{"id":"https://prismo.news/@mxb#main-key","owner":"https://prismo.news/@mxb","publicKeyPem":"-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA41gqLkBYuPLurC2TarF8\nbdyvqP54XzKyScJ6iPNkk4D4plYdWUVj0aOIHQ8LVfBeziH83jDMpRegm1sRLpNG\n1Ti+SzlWyTwugJ8wfQvwJL7iEzqhuPFddjPLpv0djMptvm5vtG6u6O3g4RpX12bv\n4pYRoMStPSv9KRKD/8Naw5Nv85PIWRc9rOly/EoVZBnbesroo69caiGthgChE2pa\niisQ5CEgj/615WUlUATkz3VdExKQkQOdeVABheIvcS5OsMurXnpWyLQ4n9WalNvF\nlJc08aOTIo4plsLAvdcGRDsBzio4qPok3jgzPpFkDqe+02WG/QMPT9VrzKO49N5R\nqQIDAQAB\n-----END PUBLIC KEY-----\n"},"icon":{"type":"Image","url":"https://prismo.s3.wasabisys.com/account/1/avatar/size_400-b6e570850878684362ba3b4bd9ceb007.jpg","media_type":null},"@context":["https://www.w3.org/ns/activitystreams","https://w3id.org/security/v1",{"Hashtag":"as:Hashtag"},{"votes":{"@id":"as:votes","@type":"@id"}}]}

test/fixtures/prismo-url-map.json

@@ -1,4 +1,16 @@
 {
+    "id": "https://prismo.news/posts/83#Create",
+    "type": "Create",
+    "actor": [
+        {
+            "type": "Person",
+            "id": "https://prismo.news/@mxb"
+        }
+    ],
+    "to": [
+        "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "object": {
         "id": "https://prismo.news/posts/83",
         "type": "Article",
         "name": "Introducing: Federated follows!",
@@ -49,4 +61,5 @@
                 }
             }
         ]
+    }
 }

test/support/httpoison_mock.ex

@@ -3,6 +3,14 @@ defmodule HTTPoisonMock do
 
   def get(url, body \\ [], headers \\ [])
 
+  def get("https://prismo.news/@mxb", _, _) do
+    {:ok,
+     %Response{
+       status_code: 200,
+       body: File.read!("test/fixtures/httpoison_mock/https___prismo.news__mxb.json")
+     }}
+  end
+
   def get("https://osada.macgirvin.com/channel/mike", _, _) do
     {:ok,
      %Response{