* Add support for open telemetry ([#633](https://www.github.com/googleapis/python-spanner-django/issues/633)) ([2ba879a](https://www.github.com/googleapis/python-spanner-django/commit/2ba879a))

* add decimal/numeric support ([#620](https://www.github.com/googleapis/python-spanner-django/issues/620)) ([d09ad61](https://www.github.com/googleapis/python-spanner-django/commit/d09ad61))

* added unit test with coverage of 68% ([#611](https://www.github.com/googleapis/python-spanner-django/issues/611)) ([92ad508](https://www.github.com/googleapis/python-spanner-django/commit/92ad508))

* update docs and nox file to compile it ([#610](https://www.github.com/googleapis/python-spanner-django/issues/610)) ([876f2fc](https://www.github.com/googleapis/python-spanner-django/commit/876f2fc))

* update workflow files to uniformly distribute the test modules by time taken by each test module ([#615](https://www.github.com/googleapis/python-spanner-django/issues/615)) ([c386123](https://www.github.com/googleapis/python-spanner-django/commit/c386123))

* move migrations test modules to run against different emulator ([#613](https://www.github.com/googleapis/python-spanner-django/issues/613)) ([5b3b2e4](https://www.github.com/googleapis/python-spanner-django/commit/5b3b2e4))

* correct import path ([#649](https://www.github.com/googleapis/python-spanner-django/issues/649)) ([bc99bb5](https://www.github.com/googleapis/python-spanner-django/commit/bc99bb5))

* remove error msg check from test_decimal_precision_limit for non emulator test ([#647](https://www.github.com/googleapis/python-spanner-django/issues/647)) ([fe4a062](https://www.github.com/googleapis/python-spanner-django/commit/fe4a062))

* remove error msg check from test_decimal_precision_limit ([#646](https://www.github.com/googleapis/python-spanner-django/issues/646)) ([9be15c0](https://www.github.com/googleapis/python-spanner-django/commit/9be15c0))

* remove delete of instance if it already exists, as it might be in use by another test ([#641](https://www.github.com/googleapis/python-spanner-django/issues/641)) ([0544208](https://www.github.com/googleapis/python-spanner-django/commit/0544208))

* correct test case for sql_flush for multiple delete table commands ([#629](https://www.github.com/googleapis/python-spanner-django/issues/629)) ([3de1a81](https://www.github.com/googleapis/python-spanner-django/commit/3de1a81))

* iexact lookup with Transform expression crash issue when RHS is direct value and a transform function is involved ([#628](https://www.github.com/googleapis/python-spanner-django/issues/628)) ([2772b57](https://www.github.com/googleapis/python-spanner-django/commit/2772b57))

* Update links in comments to use googleapis repo ([#622](https://www.github.com/googleapis/python-spanner-django/issues/622)) ([3fa1aeb](https://www.github.com/googleapis/python-spanner-django/commit/3fa1aeb))

* Remove un necessary file from code base ([#608](https://www.github.com/googleapis/python-spanner-django/issues/608)) ([58b9969](https://www.github.com/googleapis/python-spanner-django/commit/58b9969))

* lint_setup_py was failing in Kokoro is now fixed ([#607](https://www.github.com/googleapis/python-spanner-django/issues/607)) ([d125148](https://www.github.com/googleapis/python-spanner-django/commit/d125148))

* Replace, fast-forward Django CI branch ([#598](https://www.github.com/googleapis/python-spanner-django/issues/598)) ([5d65e3f](https://www.github.com/googleapis/python-spanner-django/commit/5d65e3f))

* update coverage score in nox file and cleanup imports in test_operations ([#638](https://www.github.com/googleapis/python-spanner-django/issues/638)) ([b1f49f7](https://www.github.com/googleapis/python-spanner-django/commit/b1f49f7))

* add docs build kokoro config for django spanner ([#644](https://www.github.com/googleapis/python-spanner-django/issues/644)) ([ecf241a](https://www.github.com/googleapis/python-spanner-django/commit/ecf241a))

* release 2.2.1b1 ([505d3ac](https://www.github.com/googleapis/python-spanner-django/commit/505d3ac))

* add SECURITY.md ([#616](https://www.github.com/googleapis/python-spanner-django/issues/616)) ([75f1a65](https://www.github.com/googleapis/python-spanner-django/commit/75f1a65))

* add a Code of Conduct ([#604](https://www.github.com/googleapis/python-spanner-django/issues/604)) ([c996400](https://www.github.com/googleapis/python-spanner-django/commit/c996400))

* Remove README note about Variance/StdDev ([#601](https://www.github.com/googleapis/python-spanner-django/issues/601)) ([4ec363f](https://www.github.com/googleapis/python-spanner-django/commit/4ec363f))

* Add contributing section to README ([#600](https://www.github.com/googleapis/python-spanner-django/issues/600)) ([2311854](https://www.github.com/googleapis/python-spanner-django/commit/2311854))

* README updates ([#599](https://www.github.com/googleapis/python-spanner-django/issues/599)) ([2c8fb24](https://www.github.com/googleapis/python-spanner-django/commit/2c8fb24))