Release 6.0.0-pre.20211220.1 (2022-01-11)

Baseline: 7f55cb768ae22352ac6599086e7cf6525a9565a5

Important changes:

  - Match remote and local xcode version by most granular version.

This release contains contributions from many people at Google, as well as Kevin Lin, lihu.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85878b4..7e29999 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,54 @@
+## Release 6.0.0-pre.20211220.1 (2022-01-11)
+
+```
+Baseline: 7f55cb768ae22352ac6599086e7cf6525a9565a5
+```
+
+Important changes:
+
+  - Match remote and local xcode version by most granular version.
+
+This release contains contributions from many people at Google, as well as Kevin Lin, lihu.
+
+## Release 6.0.0-pre.20211215.3 (2021-12-21)
+
+```
+Baseline: 8dcf27e590ce77241a15fd2f2f8b9889a3d7731b
+
+Cherry picks:
+
+   + 7074bcff7d1fcba7230fec11ce1d155b6e3d51b1:
+     Automated rollback of commit
+     ed825a49ef18a87e75fcbc381bb9b656e83b04fb.
+```
+
+Important changes:
+
+  - Allow \a \b \f \v escape sequences in Starlark.
+
+This release contains contributions from many people at Google, as well as Alex Eagle, Benjamin Peterson, Bradley Burns, Dan Fleming, Fabian Meumertzheim, Greg, Xavier Bonaventura, Xdng Yng.
+
+## Release 6.0.0-pre.20211202.4 (2021-12-20)
+
+```
+Baseline: 00a3354d54752648fc81a8c7277775780a05f5f2
+
+Cherry picks:
+
+   + c873525af9e045c87dfca2ac82ca68e9b76f8820:
+     Extract out constant for "current time" magic value in
+     Path#setLastModifiedTime, to avoid confusion.
+   + 7074bcff7d1fcba7230fec11ce1d155b6e3d51b1:
+     Automated rollback of commit
+     ed825a49ef18a87e75fcbc381bb9b656e83b04fb.
+```
+
+Important changes:
+
+  - alias() can now select() directly on constraint_value()
+
+This release contains contributions from many people at Google, as well as Brentley Jones, Chris Fredrickson, Danny Wolf, Dimi Shahbaz, Ed Schouten, Fabian Meumertzheim, Fredrik Medley, Greg Estren, hvadehra, Noa Resare, Simon Bjorklen, Tetsuo Kiso.
+
 ## Release 6.0.0-pre.20211117.1 (2021-12-07)
 
 ```