Replace pascaldekloe/verify with stretchr/testify

[magiconair]

While the verify.Values library has served us well it shows its age in that it doesn't show the private fields that are necessary for debugging.

I'm going to create a PR to replace all calls of verify.Values with require.Equal. The call arguments have to be reversed since verify.Values(t, "", got, want) maps to require.Equal(t, want, got)