Version 2.6.0

Merge commit '1a844e42b1129f81ff83fdb1b0f215923f437795' into stable
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c77e474..71712b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -124,6 +124,12 @@
 * new lint: `avoid_web_libraries_in_flutter` (experimental)
 * (internal) prepare `unnecessary_lambdas` for coming `MethodInvocation` vs. `FunctionExpressionInvocation` changes
 
+## 2.5.2 - 2019-10-08
+
+This is a patch release with properly signed binaries required for macOS
+Catalina (Issue [38765][]).
+
+[38765]: https://github.com/dart-lang/sdk/issues/38765
 
 ## 2.5.1 - 2019-09-27
 
diff --git a/tools/VERSION b/tools/VERSION
index a6ba21a7..b2fe8b5 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -29,11 +29,11 @@
 #  * Deprecating an old ABI version:
 #     - increase OLDEST_SUPPORTED_ABI_VERSION to the version that is supported.
 #
-CHANNEL dev
+CHANNEL stable
 MAJOR 2
 MINOR 6
 PATCH 0
-PRERELEASE 8
-PRERELEASE_PATCH 2
+PRERELEASE 0
+PRERELEASE_PATCH 0
 ABI_VERSION 19
 OLDEST_SUPPORTED_ABI_VERSION 18