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

* Add ToSql implementations for Vec<T> and &[T] and a FromSql impleme…

…ntation

  for Vec<T> corresponding to one-dimensional Postgres arrays.
* Add a nightly feature which adds unix socket support without an external
  dependency.

* Allow for configuration of transaction semantics

* Extend serde_json support to 0.7

* Adjust Type::Enum to carry its variants

* Add support for MACADDR types via the eui48 crate.

* Add Domain, Enum, Pseudo, and Composite variants to Type.

* Add Kind::Domain

* Add SSL support for security-framework

* Support BIT/VARBIT <-> BitVec conversions
* Add a Connection::query method
* Restructure FromSql to split the from null case to a separate method
* Restructure SslMode to store references to NegotiateSsls
* cancel_query now takes its data argument by reference
* Make DbError fields public and remove accessor methods
* Restructure Error and ConnectError variants
* Make the notification::Iter iterator perform nonblocking reads
* Add new SqlState codes from Postgres 9.5