Version 2.8.0-dev.18.0

Merge commit 'f6acefa078be0cf448f18697a025684fbf5d0ea0' into dev
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22d9056..9f68bb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2838,7 +2838,7 @@
 
 * `dart:web_audio`
 
-  * new method on `AudioContext` – `createIirFilter` returns a new class
+  * new method on `AudioContext` – `createIirFilter` returns a new class
     `IirFilterNode`.
 
 * `dart:web_gl`
diff --git a/tools/VERSION b/tools/VERSION
index 5b8c541..85a4ce0 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 be
+CHANNEL dev
 MAJOR 2
 MINOR 8
 PATCH 0
-PRERELEASE 0
+PRERELEASE 18
 PRERELEASE_PATCH 0
 ABI_VERSION 31
 OLDEST_SUPPORTED_ABI_VERSION 31