Edgedb

Changes
=======

* support protocol version 0.12
(by fmoor in 5ce52ed8)

* Update to protocol version 0.13
(by 1st1 in c690250, 8by fmoor in 5ce52ed8, by jaclarke in a5a6218d for 253)

* Lookup `edgedb.toml` recursively in parent directories
(by fmoor in d9a12b88 for 245)

* Update connection parameter resolution
(by jaclarke in 085f5748 for 241)

* Implement `EDGEDB_CLIENT_SECURITY`
(by fmoor in ac46c374)

* Add optional/required `query_single*` methods + rename `retrying_transaction` + update pool to `create_client` API
(by jaclarke in f2ae0d0e for 249)

Deprecations
============

* Deprecate `Pool.acquire()` and `Pool.release()`
(by fmoor in 2d501e97 for 217)

* Rename `tls_verify_hostname` to `tls_security`
(by fmoor in 2086b866)

Fixes
=====

* Do not attempt to del transport in `connection_lost` if it has been already
(by elprans in c719e79b for 215)

* Retry if `start()` raises a retryable error (228)
(by fantix in ffaae01a for 228)

* Fix broken pool connection cleanup
(by fantix in be449591 for 222)

* Fix deprecated usage of `SSLContext` (231)
(by elprans in f73f9999 for 231)

* Bugfix: `_borrowed_for` is now set entering a transaction (233)
(by fantix in bf763d1d for 233)

* Send zero arguments as zero-length bytes in proto 0.12 (238)
(by tailhook in f51dd514 for 238)

* Fix `retrying_transaction()` on network errors
(by fmoor in cc001e62)

* Fix connection and retry options on `AsyncIOPool` (237)
(by tailhook in 44e279f4 for 237)

* Auto retry read-only queries outside transactions (243)
(by fmoor in 76bb5865 for 243)

* Fix `credentials_file` argument typo on `async_connect` (252)
(by mkniewallner in b21b70ae for 252)

Fixes
=====

* Fix failing tests regarding --help (207)
(by fantix in 956a2cac for 207)

* Fix confusing error when no arguments are passed to a query with named params (208)
(by elprans in 8e0b334e for 208)

* Add Python 3.10 compatibility (209)
(by elprans in 3472f17d for 209)

* Fix asyncio SSL unclosed warning (210)
(by fantix in d718839c for 210)

* More reliable transport double-closing
(by fantix in 337b7794)

* Rename `query_one` to `query_single`
(by fmoor in f6900b01)

* New APIs: `conn.retrying_transaction()` and `conn.raw_transaction()`.
* `conn.transaction()` has been deprecated.
* `conn.aclose()` implements graceful disconnect from the DB server.
* Starting transactions in `conn.execute()` is no longer allowed.
* `wait_until_available` parameter for connection APIs.

Fixes
=====

* Fix SCRAM implementation to adhere to the spec
(by tailhook in 99351291 for 60)

* Update SASL-related protocol messages
(by tailhook in cc95d8d0)

* Set protocol version to 0.7
(by 1st1 in 919a4c7f)