Prepare the 2.13.0.dev1 release. (pantsbuild#15393)

[ci skip-rust]

CONTRIBUTORS.md

@@ -56,6 +56,7 @@ Created by running `./pants run build-support/bin/contributors.py`.
 + David Taylor
 + David Turner
 + Derek Young
++ Dimitrios Bariamis
 + Divij Rajkumar
 + Dominic Hamon
 + Dorothy Ordogh
@@ -130,6 +131,7 @@ Created by running `./pants run build-support/bin/contributors.py`.
 + Justin Trobec
 + Karin Lundberg
 + Kaushik Srenevasan
++ Ken Howard
 + Ken Kawamoto
 + Kevin Oliver
 + Kevin Sweeney
@@ -255,5 +257,6 @@ Created by running `./pants run build-support/bin/contributors.py`.
 + billybecker
 + eugene yokota
 + hephex
++ twunderlich-grapl
 + wimax-grapl
 + Ólafur Páll Geirsson

src/python/pants/VERSION

@@ -1 +1 @@
-2.13.0.dev0
+2.13.0.dev1

src/python/pants/notes/2.13.x.md

@@ -1,5 +1,37 @@
 # 2.12.x Release Series
 
+## 2.13.0.dev1 (May 10, 2022)
+
+### New Features
+
+* Initial support for building dists using mypyc. ([#15380](https://github.com/pantsbuild/pants/pull/15380))
+
+* Support dependency inference on vcs_version targets. ([#15385](https://github.com/pantsbuild/pants/pull/15385))
+
+* Support for getting a version string from git. ([#15374](https://github.com/pantsbuild/pants/pull/15374))
+
+* Add `tailor` for `poetry_requirements` and `pipenv_requirements` ([#15352](https://github.com/pantsbuild/pants/pull/15352))
+
+### User API Changes
+
+* Add default mapping for pygithub ([#15361](https://github.com/pantsbuild/pants/pull/15361))
+
+### Bug fixes
+
+* Generalize Docker dep inference for all packageables. ([#15375](https://github.com/pantsbuild/pants/pull/15375))
+
+* Fix `tailor` detection of existing `python_requirements` targets ([#15363](https://github.com/pantsbuild/pants/pull/15363))
+
+* Add the "named args explanation" to other relevant `parametrize` error messages. ([#15362](https://github.com/pantsbuild/pants/pull/15362))
+
+* Use abspath to sandbox in PATH for docker tool shims. ([#15341](https://github.com/pantsbuild/pants/pull/15341))
+
+### Documentation
+
+* Improve `help` and error message for `[python-infer].unowned_dependency_behavior` ([#15334](https://github.com/pantsbuild/pants/pull/15334))
+
+* Disallow `!` patterns in `build_ignore`. ([#15366](https://github.com/pantsbuild/pants/pull/15366))
+
 ## 2.13.0.dev0 (May 05, 2022)
 
 ### New Features