Fix typespecs

Author: mickel8

lib/ex_ice/ice_agent.ex

@@ -69,7 +69,7 @@ defmodule ExICE.ICEAgent do
               optional(:credential) => String.t()
             }
           ],
-          ice_transport_policy: :all | :relay | nil,
+          ice_transport_policy: :all | :relay,
           on_gathering_state_change: pid() | nil,
           on_connection_state_change: pid() | nil,
           on_data: pid() | nil,

lib/ex_ice/priv/candidate_pair.ex

@@ -11,11 +11,11 @@ defmodule ExICE.Priv.CandidatePair do
 
   @type t() :: %__MODULE__{
           id: integer(),
-          local_cand_id: Candidate.id(),
+          local_cand_id: integer(),
           nominate?: boolean(),
           nominated?: boolean(),
           priority: non_neg_integer(),
-          remote_cand_id: Candidate.id(),
+          remote_cand_id: integer(),
           state: state(),
           valid?: boolean,
           succeeded_pair_id: integer() | nil,