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## 0.31.2

**`(internal):`** Add an `internal` package, which now contains the internal functionality previously included in the `core` package (e.g. `core.Caller` -> `internal.Caller`).
Although technically a breaking change in terms of the module itself, this change was always the intention, and should have zero impact on users.
Any `core` type that is meant for public consumption remains in the exported `core` package (e.g. `core.APIError` and `core.RequestOption`).

## 0.31.1

**`(internal):`** Adds additional tests to confirm the behavior of the `core.Retrier`.
No functional, user-facing changes are included.