Update default reference primier's code

* Introduce new iterator interface to allow people to update typehints
* Deprecate CommandCursor...

* 1.3.x:
Add documentation regarding new features
Mark classes as @final and deprecate exten...

Change `ResolveTargetDocumentListener` to be an event subscriber instead of an event listener

Mark classes as @final and deprecate extending them

Run appropriate query operations when replacing documents

Loosen naming rules for discriminator values

This ensures that when not using update operators, the query does not attempt to run an updateOn...

Introducing class metadata not found event

Remove previously deprecated operations from Query Builder

These helpers were originally removed when porting Doctrine MongoDB's query builder over to ODM ...

geoNear and mapReduce are no longer supported in Query

ODM removed support for geoNear commands in its query builder. Applications should use the $geoN...

* 1.3.x:
Fix tests against php 7.4snapshot
Deprecate mapReduce and geoNear methods in query ...

This dispatches the newly created event in MetadataFactory, returning metadata from the event if...

This event is based on the same event in ORM and can be used to add fallback loading when metada...

Fix tests against php 7.4snapshot

* Install libonig-dev as it is temporarily required for snapshot and nighly tests (see https://g...

Provide deprecation notices for deprecated query types

Fix dir permissions for proxies

Fix generation of proxy classes

Fix metadata storage when uploading GridFS files

[1.3] Use build stages in .travis.yml

Allow returning null from getAssociationTargetClass

Fix wrong behavior of sortMeta

Mark methods and classes as internal

* 1.3.x:
Use constants for MongoDB error codes
Fix failing index test
Fix detection of sha...

* 1.2.x:
Use constants for MongoDB error codes
Fix failing index test
Fix detection of sha...

[1.2] Fix sharding commands for MongoDB 4.0

Revert "Fix wrong usage of discriminator map in complex document inheritance chains"

Clarify deprecation of update() and multiple()

* 1.3.x: (65 commits)
Clarify deprecation block for same-namespace resolution
Add BC layer f...

Remove unnecessary files for production

* 1.2.x:
Add test with overly long index name to confirm exception
Document index name prefi...

Fix embedding documents containing named indexes

Add missing `addFields` method for Stage abstract

Fix wrong usage of discriminator map in complex document inheritance chains

Previously, the discriminator was only added to the query if the class itself had a discriminato...

If a child class sets its own discriminator map, we must assume that it overrides the original m...

Test against supported versions of MongoDB

Support for MongoDB 3.2 ran out in September 2018 while we forgot to add 4.0 to the build pipeline.

Schema manager should handle shard key on reference

Document autoload requirement for generated proxies

Allow Symfony 3.4

See: https://github.com/doctrine/mongodb-odm/issues/1957

[2.0] Add missing documentation of same-namespace resolution drop

Clarify deprecation block for same-namespace resolution

[2.0] Add PHP 7.4snapshot to build pipeline

[1.3] Optimize nested collection deletions