[Release notes](https://github.com/graphql-python/graphene/wiki/v3-release-notes)
The full release notes including an upgrade guide can be found here: https://github.com/graphql-python/graphene/wiki/v3-release-notes
What's Changed
* Graphene v3 following v3 graphql-core by mvanlonden in https://github.com/graphql-python/graphene/pull/1048
* Fix typos by minho42 in https://github.com/graphql-python/graphene/pull/1066
* Remove AbstractType by jkimbo in https://github.com/graphql-python/graphene/pull/1053
* Propagate arguments of relay.NodeField to Field by tdiam in https://github.com/graphql-python/graphene/pull/1036
* Fix typo in execute.rst by TheMelter in https://github.com/graphql-python/graphene/pull/1115
* Increase the allowed version of aniso8601 by ymoch in https://github.com/graphql-python/graphene/pull/1072
* Update quickstart.rst by ibhlool7 in https://github.com/graphql-python/graphene/pull/1090
* Add file uploading docs by jkimbo in https://github.com/graphql-python/graphene/pull/1084
* Fix objecttypes DefaultResolver example (1087) by tompao in https://github.com/graphql-python/graphene/pull/1088
* Fix tests by jkimbo in https://github.com/graphql-python/graphene/pull/1119
* Fix example code by jkimbo in https://github.com/graphql-python/graphene/pull/1120
* Update readme by jkimbo in https://github.com/graphql-python/graphene/pull/1130
* Use unidecode to handle unicode characters in constant names by henrythor in https://github.com/graphql-python/graphene/pull/1080
* The default_value of InputField should be INVALID by ganwell in https://github.com/graphql-python/graphene/pull/1111
* Add a helpful message to when a global_id fails to parse. by allen-munsch in https://github.com/graphql-python/graphene/pull/1074
* fix example middleware class in docs by dsanders11 in https://github.com/graphql-python/graphene/pull/1134
* fix typo in class 'Interface' by JMmmmuu in https://github.com/graphql-python/graphene/pull/1135
* Fix example query in quickstart doc by ko-lem in https://github.com/graphql-python/graphene/pull/1139
* Fixed import causing Graphene v3 to crash by jaydenwindle in https://github.com/graphql-python/graphene/pull/1143
* Replace INVALID with Undefined by jkimbo in https://github.com/graphql-python/graphene/pull/1146
* Added support for subscription by rob-blackbourn in https://github.com/graphql-python/graphene/pull/1107
* Remove subclass polyfill by syrusakbary in https://github.com/graphql-python/graphene/pull/1156
* Updated all str.format(…) to f-strings by syrusakbary in https://github.com/graphql-python/graphene/pull/1158
* Fixed examples, make root object explicit inside resolvers and mutate by hzlmn in https://github.com/graphql-python/graphene/pull/1159
* Remove unused function by jkimbo in https://github.com/graphql-python/graphene/pull/1160
* Add some more tests for Interface by jkimbo in https://github.com/graphql-python/graphene/pull/1154
* Use default_resolver to resolve values when using the source attribute by jkimbo in https://github.com/graphql-python/graphene/pull/1155
* Add note about the use of `args` by jkimbo in https://github.com/graphql-python/graphene/pull/1170
* Docs: integrations: fix FastAPI link by sduthil in https://github.com/graphql-python/graphene/pull/1177
* Fix resolve method parameters bullet list by rrueth in https://github.com/graphql-python/graphene/pull/1178
* Allow fast ObjectType creation based on dataclasses by syrusakbary in https://github.com/graphql-python/graphene/pull/1157
* added graphene import to READMEs by kimbo in https://github.com/graphql-python/graphene/pull/1183
* Update excluded packages list to properly exclude examples package by radekwlsk in https://github.com/graphql-python/graphene/pull/1187
* Fix typos by kevinharvey in https://github.com/graphql-python/graphene/pull/1192
* Fix issue with trailing whitespace by jkimbo in https://github.com/graphql-python/graphene/pull/1197
* Fix typo in quickstart document by dbgb in https://github.com/graphql-python/graphene/pull/1201
* Fix DateTime Scalar parse_literal methods (1199) by Cito in https://github.com/graphql-python/graphene/pull/1200
* Remove staticmethod decorator in mutations doc by jkimbo in https://github.com/graphql-python/graphene/pull/1206
* Remove to_const function by jkimbo in https://github.com/graphql-python/graphene/pull/1212
* Update requirement for Query type in mutation docs by jkimbo in https://github.com/graphql-python/graphene/pull/1213
* Rename variables called type to type_ by DoctorJohn in https://github.com/graphql-python/graphene/pull/1216
* Set min version of graphql-core to v3.1.1 by jkimbo in https://github.com/graphql-python/graphene/pull/1215
* Revert 1213 update mutation docs by jkimbo in https://github.com/graphql-python/graphene/pull/1214
* ObjectType meta arguments by jkimbo in https://github.com/graphql-python/graphene/pull/1219
* Add Base64 scalar by EpicEric in https://github.com/graphql-python/graphene/pull/1221
* Expose Base64 type and add custom scalar examples by jkimbo in https://github.com/graphql-python/graphene/pull/1223
* Improve enum compatibility by jkimbo in https://github.com/graphql-python/graphene/pull/1153
* Minor grammatical fix in the schema docs by rednafi in https://github.com/graphql-python/graphene/pull/1237
* Subscription revamp by syrusakbary in https://github.com/graphql-python/graphene/pull/1235
* Split out the subscriptions documentation a separate file and fix it by jkimbo in https://github.com/graphql-python/graphene/pull/1245
* Fix subscribe with arguments by jkimbo in https://github.com/graphql-python/graphene/pull/1251
* Fix Typo in Docs by plopd in https://github.com/graphql-python/graphene/pull/1252
* Fix typo in Schema docs by varundey in https://github.com/graphql-python/graphene/pull/1259
* add BigInt type by pizzapanther in https://github.com/graphql-python/graphene/pull/1261
* Syntax Error Fixed for Dictionary assert by lnxpy in https://github.com/graphql-python/graphene/pull/1267
* Add UnforgivingExecutionContext by AlecRosenbaum in https://github.com/graphql-python/graphene/pull/1255
* Remove Object Mutation dead link from Relay docs by varundey in https://github.com/graphql-python/graphene/pull/1272
* fix(Decimal): parse integers as decimal. by zbyte64 in https://github.com/graphql-python/graphene/pull/1295
* Fix links to Relay docs by bartenra in https://github.com/graphql-python/graphene/pull/1318
* Language fixes on index.rst by shukryzablah in https://github.com/graphql-python/graphene/pull/1313
* Use argument's `default_value` regardless if the input field is required by minhtule in https://github.com/graphql-python/graphene/pull/1326
* fix field name in execute.rst example by kevinr-electric in https://github.com/graphql-python/graphene/pull/1327
* Fix typo in docstring of ObjectType by sir-sigurd in https://github.com/graphql-python/graphene/pull/1343
* Allow later aniso8601 releases by fabaff in https://github.com/graphql-python/graphene/pull/1331
* Update pytz to 2021.1 by fabaff in https://github.com/graphql-python/graphene/pull/1330
* add support for query validation by aryaniyaps in https://github.com/graphql-python/graphene/pull/1357
* Fix actions by aryaniyaps in https://github.com/graphql-python/graphene/pull/1359
* Fix GraphQL-core dependency by ekampf in https://github.com/graphql-python/graphene/pull/1377
* Fix unseen examples by aryaniyaps in https://github.com/graphql-python/graphene/pull/1376
New Contributors
* minho42 made their first contribution in https://github.com/graphql-python/graphene/pull/1066
* tdiam made their first contribution in https://github.com/graphql-python/graphene/pull/1036
* TheMelter made their first contribution in https://github.com/graphql-python/graphene/pull/1115
* ymoch made their first contribution in https://github.com/graphql-python/graphene/pull/1072
* ibhlool7 made their first contribution in https://github.com/graphql-python/graphene/pull/1090
* tompao made their first contribution in https://github.com/graphql-python/graphene/pull/1088
* henrythor made their first contribution in https://github.com/graphql-python/graphene/pull/1080
* ganwell made their first contribution in https://github.com/graphql-python/graphene/pull/1111
* allen-munsch made their first contribution in https://github.com/graphql-python/graphene/pull/1074
* dsanders11 made their first contribution in https://github.com/graphql-python/graphene/pull/1134
* JMmmmuu made their first contribution in https://github.com/graphql-python/graphene/pull/1135
* ko-lem made their first contribution in https://github.com/graphql-python/graphene/pull/1139
* jaydenwindle made their first contribution in https://github.com/graphql-python/graphene/pull/1143
* rob-blackbourn made their first contribution in https://github.com/graphql-python/graphene/pull/1107
* hzlmn made their first contribution in https://github.com/graphql-python/graphene/pull/1159
* sduthil made their first contribution in https://github.com/graphql-python/graphene/pull/1177
* rrueth made their first contribution in https://github.com/graphql-python/graphene/pull/1178
* kimbo made their first contribution in https://github.com/graphql-python/graphene/pull/1183
* radekwlsk made their first contribution in https://github.com/graphql-python/graphene/pull/1187
* kevinharvey made their first contribution in https://github.com/graphql-python/graphene/pull/1192
* dbgb made their first contribution in https://github.com/graphql-python/graphene/pull/1201
* Cito made their first contribution in https://github.com/graphql-python/graphene/pull/1200
* DoctorJohn made their first contribution in https://github.com/graphql-python/graphene/pull/1216
* EpicEric made their first contribution in https://github.com/graphql-python/graphene/pull/1221
* rednafi made their first contribution in https://github.com/graphql-python/graphene/pull/1237
* plopd made their first contribution in https://github.com/graphql-python/graphene/pull/1252
* lnxpy made their first contribution in https://github.com/graphql-python/graphene/pull/1267
* AlecRosenbaum made their first contribution in https://github.com/graphql-python/graphene/pull/1255
* zbyte64 made their first contribution in https://github.com/graphql-python/graphene/pull/1295
* bartenra made their first contribution in https://github.com/graphql-python/graphene/pull/1318
* shukryzablah made their first contribution in https://github.com/graphql-python/graphene/pull/1313
* kevinr-electric made their first contribution in https://github.com/graphql-python/graphene/pull/1327
* sir-sigurd made their first contribution in https://github.com/graphql-python/graphene/pull/1343
* fabaff made their first contribution in https://github.com/graphql-python/graphene/pull/1331
* aryaniyaps made their first contribution in https://github.com/graphql-python/graphene/pull/1357
**Full Changelog**: https://github.com/graphql-python/graphene/compare/v2.1.8...v3.0.0