Prepare release without dependency on package:charcode (#54)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43f4dd0..8d01529 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.1
+
+* Dependency clean-up.
+
 ## 3.0.0
 
 * Stable null safety release.
diff --git a/pubspec.yaml b/pubspec.yaml
index b908be4..8783bb3 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: convert
-version: 3.0.0
+version: 3.0.1
 description: >-
   Utilities for converting between data representations.
   Provides a number of Sink, Codec, Decoder, and Encoder types.