Make longer bios possible.

priv/repo/migrations/20170529093232_longer_bios.exs

@@ -0,0 +1,9 @@
+defmodule Pleroma.Repo.Migrations.LongerBios do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      modify :bio, :text
+    end
+  end
+end