chore: release 0.4.0 (googleapis#57)

🤖 I have created a release \*beep\* \*boop\*
---
## [0.4.0](https://www.github.com/googleapis/python-documentai/compare/v0.3.0...v0.4.0) (2021-03-25)


### Features

* add 'from_service_account_info' factory to clients ([d6f183a](https://www.github.com/googleapis/python-documentai/commit/d6f183a696b211c6d29bc28e9bbd0a8537f65577))
* add common resource path helpers, expose client transport ([googleapis#43](https://www.github.com/googleapis/python-documentai/issues/43)) ([4918e62](https://www.github.com/googleapis/python-documentai/commit/4918e62033b4c118bf99ba83730377b4ecc86d17))
* add documentai v1 ([googleapis#101](https://www.github.com/googleapis/python-documentai/issues/101)) ([74fabb5](https://www.github.com/googleapis/python-documentai/commit/74fabb5e260ecc27e9cf005502d79590fa7f72e4))
* add from_service_account_info factory and fix sphinx identifiers  ([googleapis#80](https://www.github.com/googleapis/python-documentai/issues/80)) ([d6f183a](https://www.github.com/googleapis/python-documentai/commit/d6f183a696b211c6d29bc28e9bbd0a8537f65577))


### Bug Fixes

* added if statement to filter out dir blob files ([googleapis#63](https://www.github.com/googleapis/python-documentai/issues/63)) ([7f7f541](https://www.github.com/googleapis/python-documentai/commit/7f7f541bcf4d2f42b2f619c2ceb45f53c5d0e9eb))
* adds comment with explicit hostname change ([googleapis#94](https://www.github.com/googleapis/python-documentai/issues/94)) ([bb639f9](https://www.github.com/googleapis/python-documentai/commit/bb639f9470304b9c408143a3e8091a4ca8c54160))
* fix sphinx identifiers ([d6f183a](https://www.github.com/googleapis/python-documentai/commit/d6f183a696b211c6d29bc28e9bbd0a8537f65577))
* moves import statment inside region tags ([googleapis#71](https://www.github.com/googleapis/python-documentai/issues/71)) ([a04fbea](https://www.github.com/googleapis/python-documentai/commit/a04fbeaf026d3d204dbb6c6cecf181068ddcc882))
* remove client recv msg limit and add enums to `types/__init__.py` ([googleapis#72](https://www.github.com/googleapis/python-documentai/issues/72)) ([c94afd5](https://www.github.com/googleapis/python-documentai/commit/c94afd55124b0abc8978bf86b84743dd4afb0778))
* removes C-style semicolons and slash comments ([googleapis#59](https://www.github.com/googleapis/python-documentai/issues/59)) ([1b24bfd](https://www.github.com/googleapis/python-documentai/commit/1b24bfdfc603952db8d1c633dfde108a396aa707))
* **samples:** swaps 'continue' for 'return' ([googleapis#93](https://www.github.com/googleapis/python-documentai/issues/93)) ([dabe48e](https://www.github.com/googleapis/python-documentai/commit/dabe48e8c1439ceb8a50c18aa3c7dca848a9117a))


### Documentation

* fix pypi link ([googleapis#46](https://www.github.com/googleapis/python-documentai/issues/46)) ([5162674](https://www.github.com/googleapis/python-documentai/commit/5162674091b9a2111b90eb26739b4e11f9119582))
* **samples:** new Doc AI samples for v1beta3 ([googleapis#44](https://www.github.com/googleapis/python-documentai/issues/44)) ([cc8c58d](https://www.github.com/googleapis/python-documentai/commit/cc8c58d1bade4be53fde08f6a3497eb3f79f63b1))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

chore: release 0.3.0 (googleapis#29)

chore: release 0.2.0 (googleapis#20)

🤖 I have created a release \*beep\* \*boop\* 
---
## [0.2.0](https://www.github.com/googleapis/python-documentai/compare/v0.1.0...v0.2.0) (2020-05-28)


### Features

* add mtls support ([googleapis#18](https://www.github.com/googleapis/python-documentai/issues/18)) ([50814b4](https://www.github.com/googleapis/python-documentai/commit/50814b448fba6c3f1da5e5ebf446bd91abff6811))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please).

chore: release 0.1.0 (googleapis#2)