bump version

CHANGELOG.md

@@ -1,4 +1,7 @@
-## [2.2.1-pre] - 2021-4-12
+## [2.3.0-pre] - 2021-6-1
+* Add `import 'package:xterm/isolate.dart';`
+
+## [2.2.1-pre] - 2021-6-1
 * Make BufferLine work on web.
 
 ## [2.2.0-pre] - 2021-4-12

pubspec.yaml

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 name: xterm
 description: xterm.dart is a fast and fully-featured terminal emulator for Flutter applications, with support for mobile and desktop platforms.
-version: 2.2.1-pre
+version: 2.3.0-pre
 homepage: https://github.com/TerminalStudio/xterm.dart
 
 environment: