2.8.0rc0 prep (pantsbuild#13346)

[ci skip-rust]

Co-authored-by: Eric Arellano <[email protected]>

src/python/pants/VERSION

@@ -1 +1 @@
-2.8.0.dev5
+2.8.0rc0

src/python/pants/notes/2.8.x.md

@@ -1,5 +1,55 @@
 # 2.8.x Release Series
 
+## 2.8.0rc0 (Oct 24, 2021)
+
+### New Features
+
+* `update-build-files` goal formats BUILD files with Black ([#13279](https://github.com/pantsbuild/pants/pull/13279))
+
+* Add `overrides` field to `files` and `resources` targets ([#13304](https://github.com/pantsbuild/pants/pull/13304))
+
+* Add `overrides` field to `shell_sources`, `shunit2_sources`, and `protobuf_sources` ([#13298](https://github.com/pantsbuild/pants/pull/13298))
+
+* Add `overrides` field to `python_sources` and `python_tests` target ([#13270](https://github.com/pantsbuild/pants/pull/13270))
+
+* Depending on a `python_distribution` with `pex_binary` now includes the built dist ([#13306](https://github.com/pantsbuild/pants/pull/13306))
+
+* Support arbitrary PEP-517 build systems. ([#13285](https://github.com/pantsbuild/pants/pull/13285))
+
+### User API Changes
+
+* Pants's CLI output uses the full address `dir:dir` instead of the shorthand `dir` ([#13274](https://github.com/pantsbuild/pants/pull/13274))
+
+* Rename `[python-setup]` to `[python]` and move into the python backend. ([#13345](https://github.com/pantsbuild/pants/pull/13345))
+
+* The default `sources` for `conftest.py` and `*_test.pyi` now belong to new target generator `python_test_utils`, not `python_tests` ([#13299](https://github.com/pantsbuild/pants/pull/13299))
+
+* Deprecate including `conftest.py` and `.pyi` files in `python_tests` target's `sources` field ([#13320](https://github.com/pantsbuild/pants/pull/13320))
+
+* Rename `docker_image` field `sources` to `source` ([#13327](https://github.com/pantsbuild/pants/pull/13327))
+
+* Merge docker `version` field into the `image_tags` field. ([#13308](https://github.com/pantsbuild/pants/pull/13308))
+
+* Upgrade default black version from 21.8b0 to 21.9b0 ([#13326](https://github.com/pantsbuild/pants/pull/13326))
+
+* Terraform: move `terraform validate` from `lint` to `check` ([#13301](https://github.com/pantsbuild/pants/pull/13301))
+
+* Autoflake and Pyupgrade are now activated by experimental backends ([#13317](https://github.com/pantsbuild/pants/pull/13317))
+
+* Add google cloud logging to default Python module map ([#13305](https://github.com/pantsbuild/pants/pull/13305))
+
+### Plugin API Changes
+
+* Add support for structured output from `publish` goal. ([#13292](https://github.com/pantsbuild/pants/pull/13292))
+
+### Bug fixes
+
+* Do not choke on `.` in tool names for `experimental_shell_command`s. ([#13293](https://github.com/pantsbuild/pants/pull/13293))
+
+### Documentation
+
+* Fix documentation for `file:` URLs, and add an assist for malformed URLs. ([#13272](https://github.com/pantsbuild/pants/pull/13272))
+
 ## 2.8.0.dev5 (Oct 17, 2021)
 
 ### New Features