Change environment dependencies

Author: PlugFox

.gitignore

@@ -8,7 +8,6 @@ packages
 .idea/
 web/experimental
 doc
-.dart_tool/
 
 # Or the files created by dart2js.
 *.dart.js

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 3.0.0 - 2021-03-27 
+### Changed  
+- Non nullable ready  
+- Refactoring
+  
+  
 ## 3.0.0-nullsafety.2 - 2021-03-24  
 ### Added  
 - Add some badges   

pubspec.yaml

@@ -1,16 +1,16 @@
 name: platform_info
 description: >
   Contains info about current platform
-  such as Build mode and Operating system
-version: 3.0.0-nullsafety.2
+  such as Build mode and Operating system.
+version: 3.0.0
 repository: https://github.com/PlugFox/platform_info/tree/master
 issue_tracker: https://github.com/PlugFox/platform_info/issues
 homepage: https://github.com/PlugFox/platform_info
 #author: Plague Fox <plugfox@gmail.com>
 #documentation: https://pub.dev/documentation/platform_info/latest
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   meta: ^1.3.0