Bump version. (#151)

* Updated package:quiver version

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 615ae44..4c8958e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 2.0.1
+- Switch to preview release of `package:quiver`.
+
 # 2.0.0
 - Upgraded all dependencies. `package:ffigen` now runs with sound null safety.
 

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index e9d7f66..ccb3e8b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,7 +3,7 @@
 # BSD-style license that can be found in the LICENSE file.
 
 name: ffigen
-version: 2.0.0
+version: 2.0.1
 homepage: https://github.com/dart-lang/ffigen
 description: Generator for FFI bindings, using LibClang to parse C header files.
 
@@ -14,7 +14,7 @@
   ffi: ^1.0.0
   yaml: ^3.0.0
   path: ^1.8.0
-  quiver: ^3.0.0-nullsafety.3
+  quiver: ^3.0.0
   args: ^2.0.0
   logging: ^1.0.0
   cli_util: ^0.3.0