Add internal module

Create a general `internal` module, and move `prelude_internal` to
`internal::prelude`.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 16a0a6f..8bc8533 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -103,7 +103,7 @@ pub mod prelude;
 
 mod constants;
 mod error;
-mod prelude_internal;
+mod internal;
 
 pub use client::Client;
 pub use error::{Error, Result};