Update remote context processing code to use Jason instead of Poison

lib/json/ld/context.ex

@@ -71,7 +71,7 @@ defmodule JSON.LD.Context do
     end
     document = cond do
       is_map(document) -> document
-      is_binary(document) -> case Poison.decode(document) do
+      is_binary(document) -> case Jason.decode(document) do
         {:ok, result} -> result
         {:error, reason} -> raise JSON.LD.InvalidRemoteContextError,
           message: "Context is not a valid JSON document: #{inspect reason}"

lib/json/ld/document_loader/default.ex

@@ -4,17 +4,16 @@ defmodule JSON.LD.DocumentLoader.Default do
   alias JSON.LD.DocumentLoader.RemoteDocument
 
   def load(url, _options) do
-    with {:ok, res} <- HTTPoison.get(url, [accept: "application/ld+json"],
-                                     [follow_redirect: true]),
-         {:ok, data} <- Poison.decode(res.body)
+    with {:ok, res} <-
+           HTTPoison.get(url, [accept: "application/ld+json"], [follow_redirect: true]),
+
+         {:ok, data} <-
+           Jason.decode(res.body)
     do
-      result = %RemoteDocument{
+      {:ok, %RemoteDocument{
         document: data,
-        document_url: res.request_url,
-      }
-      {:ok, result}
-    else
-      {:error, reason} -> {:error, reason}
+        document_url: res.request_url
+      }}
     end
   end
 end