Add a way to fetch all contract events

Author: ddallaire

lib/ethers.ex

@@ -802,17 +802,14 @@ defmodule Ethers do
     end
   end
 
-  defp pre_process(_event_filters_module, overrides, :get_logs_for_contract, opts) do
-    {address, _opts} = Keyword.pop(opts, :address)
-
+  defp pre_process(_event_filters_module, overrides, :get_logs_for_contract, _opts) do
     log_params =
       overrides
       |> Enum.into(%{})
       |> ensure_hex_value(:fromBlock)
       |> ensure_hex_value(:from_block)
       |> ensure_hex_value(:toBlock)
       |> ensure_hex_value(:to_block)
-      |> Map.put(:address, address)
 
     {:ok, log_params}
   end