v0.12.0

* `Slice` type removed - `[T]` directly implements ToSql and FromSql.
* `[T]`'s `ToSql` implementation is now one-indexed to match array literals.
* TLS implementations are now on wrapper structs around `SslContext` and
    `ClientBuilder`.
* The OpenSSL TLS implementation validates hostnames and tightens other
    security configuration.
* `SslMode` is now `TlsMode`.
* Unix socket support no longer requires a Cargo feature.
* Upgrade to OpenSSL 0.8.
* Update types and errors to PostgreSQL 9.6.
* Type information queries are now lazily initialized, slightly improving
    performance in contexts that don't use custom types, and avoiding issues
    with systems like CockroachDB that don't fully support `pg_catalog`.
* Notification and lazy rows iterators now implement `FallibleIterator`.
* `FromSql` now takes a `&[u8]` rather than a `Read`er, and `ToSql` now takes
    an `&mut Vec<u8>` rather than a `Write`r.
* Add a `FromSql::from_sql_nullable` convenience method.
* `io` module renamed to `tls`.

v0.11.11

* Support uuid v0.3
* Support serde_json v0.8

v0.11.10

* Fix deserialization of empty arrays
* Fix startup with Postgres 9.0
* Add a wrapper type which maps special infinite date values

v0.11.9

* Fix error in query generation for transaction configuration

v0.11.8

* Support CockroachDB's Postgres interface.
* Add a method to create a savepoint with a specific name.

* Support uuid 0.2

* Upgrade to hex 0.2

* Fix startup on versions of postgres that don't support enumeratred or

  composite types like Redshift