v0.6.2: Fix `*Update` structs

These structs could no longer be used normally to perform updates. They
have been fixed.

v0.6.1: Add BIGML_DOMAIN support

This is directly supported in `bigml-parallel`. Callers
of `bigml` must make the necessary changes themselves,
but there's now an API to support it.

v0.6.0: Retry bigml-parallel executions

This release of `bigml-parallel` will retry execution that fail because
of a "402 Payment Required" error.

This also required changing several error related APIs. Along the way, we
switched many APIs to use `#[non_exhaustive]` for better extensibility.

Requires a recent Rust with `#[non_exhaustive]`.

v0.5.0: Increase download timeouts

This version of `bigml` uses longer timeouts when downloading CSV files.
The `bigml-parallel` tool should behave the same as before.

v0.5.0-rc.1: Update to tokio 0.2

This release updates from tokio 0.1 to tokio 0.2.

v0.4.4: Add `time_formats` support

We had a version of this in v0.4.3, but it broke other features and we
yanked the release.

v0.4.2

v0.4.2: Allow adding tags to datasets

v0.4.1

v0.4.1: Allow adding tags to sources

v0.4.0: --tag, stable Rust & a minor fix

- We now run on stable Rust! Still on `tokio` 0.1.x, though, until
  things quiet down a bit. Most of our dependencies have been updated.
- The `bigml-parallel` tool now accepts a `--tag` argument which can be
  used to apply tags to the BigML execution resources we create.
- We no longer exit with a spurious error if a BigML execution error
  is lacking an `http_status` field. This will help us correctly
  support WhizzML scripts that raise their own errors.

v0.4.0-alpha.4: Upgrade for stabilized `async_await`

This currently requires the Rust `beta` channel to build, but it should
work unchanged on the next stable Rust release.