Version 3.0.0 (#13)

Updates changelog and removes (now-deprecated) authors section from
pubspec.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c12adf7..ef22eea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+#### 3.0.0 - 2021-03-15
+
+* Publish null-safe version.
+* Breaking change: Requires Dart SDK 2.12.0.
+
 #### 2.0.0
 
 * Declare support for Dart 2, drop support for Dart 1.
diff --git a/pubspec.yaml b/pubspec.yaml
index d9c669f..c968a10 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,16 +1,5 @@
 name: quiver_hashcode
 version: 3.0.0
-authors:
-- Justin Fagnani <justinfagnani@google.com>
-- Yegor Jbanov <yjbanov@google.com>
-- Chris Bracken <cbracken@google.com>
-- Alexandre Ardhuin <alexandre.ardhuin@gmail.com>
-- David Morgan <davidmorgan@google.com>
-- John McDole <codefu@google.com>
-- Matan Lurey <matanl@google.com>
-- Günter Zöchbauer <guenter@gzoechbauer.com>
-- Sean Eagan <seaneagan1@gmail.com>
-- Victor Berchet <victor@suumit.com>
 description: Compute hashCode correctly for your objects
 homepage: https://github.com/QuiverDart/quiver_hashcode