Change to 2.0.0 and drop support for Dart 1
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 267d172..c12adf7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
-#### 1.0.1
+#### 2.0.0
 
-* Declare support for Dart 2
+* Declare support for Dart 2, drop support for Dart 1.
 
 #### 1.0.0-dev.1
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 3d968dd..b6c42a0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: quiver_hashcode
-version: 1.0.1
+version: 2.0.0
 authors:
 - Justin Fagnani <justinfagnani@google.com>
 - Yegor Jbanov <yjbanov@google.com>
@@ -15,7 +15,7 @@
 homepage: https://github.com/QuiverDart/quiver_hashcode
 
 environment:
-  sdk: '>=1.8.0 <3.0.0'
+  sdk: '>=2.0.0-dev.61 <3.0.0'
 
 dev_dependencies:
   test: '^1.0.0'