Test params have order backwards

[justin808]

I'm just about to release 2.0.3 of webpacker_lite and I noticed that with some test errors, the params of using minitest are backwards, for expected and actual, in maybe all the tests.

Example:

class EnvTest < Minitest::Test
  def test_current_env
    assert_equal Webpacker::Env.current, "production"
    assert_equal Webpacker.env, "production"
    assert Webpacker.env.production?
  end