Update Linkify to 0.3.0

Added

- Support returning result as iodata and as safe iodata

Fixed

- Hashtags followed by HTML tags "a", "code" and "pre" were not detected
- Incorrect parsing of HTML links inside HTML tags
- Punctuation marks in the end of urls were included in the html links
- Incorrect parsing of mentions with symbols before them

mix.exs

@@ -157,7 +157,7 @@ defmodule Pleroma.Mixfile do
       {:floki, "~> 0.27"},
       {:timex, "~> 3.6"},
       {:ueberauth, "~> 0.4"},
-      {:linkify, "~> 0.2.0"},
+      {:linkify, "~> 0.3.0"},
       {:http_signatures, "~> 0.1.0"},
       {:telemetry, "~> 0.3"},
       {:poolboy, "~> 1.5"},