[release] Prepare changelog for 2.1.0-dev.1.0
TBR=whesse@google.com
Change-Id: I2837e27a6dbabe61a4958c0dc0e0d22757edbf3a
Reviewed-on: https://dart-review.googlesource.com/70261
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: William Hesse <whesse@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4c5588..b737694 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,12 +10,18 @@
#### Pub
-* Rename the `--checked` flag to `pub run` to `--enable-asserts`.
-
#### Other Tools
### Core library changes
+## 2.1.0-dev.1.0
+
+### Tool Changes
+
+#### Pub
+
+* Rename the `--checked` flag to `pub run` to `--enable-asserts`.
+
## 2.1.0-dev.0.0
### Tool Changes
