* Fix pg-query-stream
There were some subtle behaviors with the stream being implemented incorrectly & not working as expected with async iteration. I've modified the code based on #2050 and comments in #2035 to have better test coverage of async iterables and update the internals significantly to more closely match the readable stream interface.
Note: this is a __breaking__ (semver major) change to this package as the close event behavior is changed slightly, and `highWaterMark` is no longer supported. It shouldn't impact most usage, but breaking regardless.
* Remove a bunch of additional code
* Add test for destroy + error propagation
* Add failing test for destroying unsubmitted stream
* Do not throw an uncatchable error when closing an unused cursor
