feat(NODE-3115): Add generic parameterization

MongoClient, Db, Collection, and Cursors can now accept generic
parameters to type check the usage of the various API methods on each
class. Using generics is kept optional.

Author: nbbeeken

.gitignore

@@ -55,6 +55,8 @@ yarn.lock
 lib/
 *.tgz
 *.d.ts
+# type definition tests
+!test/unit/types
 
 .vscode
 output

CONTRIBUTORS.md

@@ -1,53 +1,100 @@
 # Contributors
 
-  - Christian Kvalheim
-  - Matt Broadstone <<mbroadst@mongodb.com>>
-  - Dan Aprahamian <<daniel.aprahamian@mongodb.com>>
-  - Katherine Walker <<katherine.walker@mongodb.com>>
-  - Aaron Heckmann
-  - Christoph Pojer
-  - Pau Ramon Revilla
-  - Nathan White
-  - Emmerman
-  - Seth LaForge
-  - Boris Filipov
-  - Stefan Schärmeli
-  - Tedde Lundgren
-  - renctan
-  - Sergey Ukustov
-  - Ciaran Jessup
-  - kuno
-  - srimonti
-  - Erik Abele
-  - Pratik Daga
-  - Slobodan Utvic
-  - Kristina Chodorow
-  - Yonathan Randolph
-  - Brian Noguchi
-  - Sam Epstein
-  - James Harrison Fisher
-  - Vladimir Dronnikov
-  - Ben Hockey
-  - Henrik Johansson
-  - Simon Weare
-  - Alex Gorbatchev
-  - Shimon Doodkin
-  - Kyle Mueller
-  - Eran Hammer-Lahav
-  - Marcin Ciszak
-  - François de Metz
-  - Vinay Pulim
-  - nstielau
-  - Adam Wiggins
-  - entrinzikyl
-  - Jeremy Selier
-  - Ian Millington
-  - Public Keating
-  - andrewjstone
-  - Christopher Stott
-  - Corey Jewett
-  - brettkiefer
-  - Rob Holland
-  - Senmiao Liu
-  - heroic
-  - gitfy
+- Christian Kvalheim
+- Matt Broadstone
+- Dan Aprahamian
+- Katherine Walker
+- Aaron Heckmann
+- Christoph Pojer
+- Pau Ramon Revilla
+- Nathan White
+- Emmerman
+- Seth LaForge
+- Boris Filipov
+- Stefan Schärmeli
+- Tedde Lundgren
+- renctan
+- Sergey Ukustov
+- Ciaran Jessup
+- kuno
+- srimonti
+- Erik Abele
+- Pratik Daga
+- Slobodan Utvic
+- Kristina Chodorow
+- Yonathan Randolph
+- Brian Noguchi
+- Sam Epstein
+- James Harrison Fisher
+- Vladimir Dronnikov
+- Ben Hockey
+- Henrik Johansson
+- Simon Weare
+- Alex Gorbatchev
+- Shimon Doodkin
+- Kyle Mueller
+- Eran Hammer-Lahav
+- Marcin Ciszak
+- François de Metz
+- Vinay Pulim
+- nstielau
+- Adam Wiggins
+- entrinzikyl
+- Jeremy Selier
+- Ian Millington
+- Public Keating
+- andrewjstone
+- Christopher Stott
+- Corey Jewett
+- brettkiefer
+- Rob Holland
+- Senmiao Liu
+- heroic
+- gitfy
+
+## Maintainers
+
+- Neal Beeken <<neal.beeken@mongodb.com>>
+- Eric Adum <<eric.adum@mongodb.com>>
+- Durran Jordan <<durran.jordan@mongodb.com>>
+
+## Community Types
+
+This release of the driver draws inspiration from the community contributed types to reduce upgrade friction as much as possible.
+We thank those listed below who contributed to the open source types, still available at `@types/mongodb` for versions prior to v4.
+
+**Thank you!**
+
+- Federico Caselli <https://github.com/CaselIT>
+- Alan Marcell <https://github.com/alanmarcell>
+- Gaurav Lahoti <https://github.com/dante-101>
+- Mariano Cortesi <https://github.com/mcortesi>
+- Enrico Picci <https://github.com/EnricoPicci>
+- Alexander Christie <https://github.com/AJCStriker>
+- Julien Chaumond <https://github.com/julien-c>
+- Dan Aprahamian <https://github.com/daprahamian>
+- Denys Bushulyak <https://github.com/denys-bushulyak>
+- Bastien Arata <https://github.com/BastienAr>
+- Wan Bachtiar <https://github.com/sindbach>
+- Geraldine Lemeur <https://github.com/geraldinelemeur>
+- Dominik Heigl <https://github.com/various89>
+- Angela-1 <https://github.com/angela-1>
+- Hector Ribes <https://github.com/hector7>
+- Florian Richter <https://github.com/floric>
+- Erik Christensen <https://github.com/erikc5000>
+- Nick Zahn <https://github.com/Manc>
+- Jarom Loveridge <https://github.com/jloveridge>
+- Luis Pais <https://github.com/ranguna>
+- Hossein Saniei <https://github.com/HosseinAgha>
+- Alberto Silva <https://github.com/albertossilva>
+- Piotr Błażejewicz <https://github.com/peterblazejewicz>
+- Linus Unnebäck <https://github.com/LinusU>
+- Richard Bateman <https://github.com/taxilian>
+- Igor Strebezhev <https://github.com/xamgore>
+- Valentin Agachi <https://github.com/avaly>
+- HitkoDev <https://github.com/HitkoDev>
+- TJT <https://github.com/Celend>
+- Julien TASSIN <https://github.com/jtassin>
+- Anna Henningsen <https://github.com/addaleax>
+- Emmanuel Gautier <https://github.com/emmanuelgautier>
+- Wyatt Johnson <https://github.com/wyattjoh>