* Uniform field paths (#268)

* unify field path structure for all drivers

* cleanup files

* rm dead code

* nested group option

* protocol cleanup + timestamp updates

* updates

* add Database.inTransaction (#192)

* optional field updates

* transaction + optional updates

* add batch delete, fixes #114

* add constraint names, fixes #118

* support arbitrary join ordering, fixes #128

* add nil update tests, fixes #149

* add EnumBuilder.read(), fixes #194

* support @OptionalParent eager load, fixes #208

* test alias nesting, fixes #223

* parent optional

* Fix dummy db placeholder (#200)

* Add tests for placeholder for dummy database

* Fix placeholder position

Placeholder position should start at 1, not 2.
No need to add 1 to position.

* Rename variable to result

* crud updates

* clear method and middleware in batch creation (#220)

Co-authored-by: Tanner <tannernelson@gmail.com>

* merge conflicts

* todo

* batch delete middleware

* Add entire models to the test database output. (#265)

Co-authored-by: Tanner <tannernelson@gmail.com>

* readble coding errors, fixes #231

* add decode test

* add alter table constraints, fixes #235

* skip constraint test sqlite

* fix @Enum and @OptionalEnum decode, fixes #249

* add fluent sql sort overloads, fixes #266

* optional field batch create test, fixes #272

* add join partial select, fixes #274

* remove XCTUnwrap usages, fixes #278

* checkout postgres fluent gm branch

* fix unit tests

* setup dual dbs

* retest

* Make siblings relation properties public (#275)

* add filter to partial select, fixes #274

* fix @OptionalParent.get when nil

* add test for set to nil, fixes #284

* doc blocks

* updat license year

* use sqlite gm branch

* package update

* mysql updates

* fix workflows

* fluent branch

* update mongo

* rm nested

Co-authored-by: Jean-Charles Campagne <jc.campagne@gmail.com>
Co-authored-by: Mads Odgaard <mads@madsodgaard.com>
Co-authored-by: Mathew Polzin <matt.polzin@gmail.com>
Co-authored-by: Florian Friedrich <ffried@me.com>