Declare support for convert 2.0.0.

I thought I had done this in the previous release, but I hadn't.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2040613002 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25ac655..36c080a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.1
+
+* Support `convert` 2.0.0.
+
 ## 2.0.0
 
 **Note**: There are no APIs in 2.0.0 that weren't also in 0.9.2. Packages that
diff --git a/pubspec.yaml b/pubspec.yaml
index f6f7f76..748452f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -7,6 +7,6 @@
   sdk: '>=1.16.0-dev.5.0 <2.0.0'
 dependencies:
   collection: '^1.0.0'
-  convert: '>=1.0.0 <2.0.0'
+  convert: '>=1.0.0 <3.0.0'
 dev_dependencies:
   test: '>=0.12.0 <0.13.0'