Fix dialyzer warnings on EEx.eval_string and EEx.eval_file

Author: michallepicki

lib/eex/lib/eex.ex

@@ -364,6 +364,7 @@ defmodule EEx do
   ### Helpers
 
   defp do_eval(compiled, bindings, options) do
+    options = Keyword.new(options)
     {result, _} = Code.eval_quoted(compiled, bindings, options)
     result
   end

lib/elixir/test/elixir/fixtures/dialyzer/regressions.ex

@@ -11,4 +11,8 @@ defmodule Dialyzer.Regressions do
       migrate: true
     )
   end
+
+  def eex_eval_opts do
+    EEx.eval_string("foo <%= bar %>", [bar: "baz"], trim: true)
+  end
 end

lib/elixir/test/elixir/kernel/dialyzer_test.exs

@@ -36,6 +36,7 @@ defmodule Kernel.DialyzerTest do
       ArgumentError,
       Atom,
       Code,
+      EEx,
       Enum,
       Exception,
       ExUnit.AssertionError,