Bump the version

Author: tugorez

packages/file_selector/file_selector_platform_interface/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.0.0-nullsafety.1
+
+* Replace extensions with leading dots.
+
 ## 2.0.0-nullsafety.0
 
 * Migration to null-safety

packages/file_selector/file_selector_platform_interface/pubspec.yaml

@@ -3,7 +3,7 @@ description: A common platform interface for the file_selector plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.0.0-nullsafety.0
+version: 2.0.0-nullsafety.1
 
 dependencies:
   flutter:
@@ -21,5 +21,5 @@ dev_dependencies:
   pedantic: ^1.8.0
 
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
   flutter: ">=1.9.1+hotfix.4"