add patch version tool

add version to 1.6.0

pubspec.yaml

@@ -2,7 +2,7 @@ name: aku_community
 description: A new Flutter project.
 publish_to: "none"
 
-version: 1.5.0-dev+41
+version: 1.6.0-dev+42
 
 environment:
   sdk: ">=2.12.0 <3.0.0"

tool/grind.dart

@@ -13,7 +13,7 @@ part '_project_manage.dart';
 
 main(args) => grind(args);
 
-@Task('add version number')
+@Task('add minor version number')
 void addVersion() async {
   String projectPath = Directory('.').absolute.path;
   String yamlPath = join(projectPath, 'pubspec.yaml');
@@ -28,6 +28,21 @@ void addVersion() async {
   await File(yamlPath).writeAsString(result);
 }
 
+@Task('add path version number')
+void addVersionPatch() async {
+  String projectPath = Directory('.').absolute.path;
+  String yamlPath = join(projectPath, 'pubspec.yaml');
+  String yamlContent = await File(yamlPath).readAsString();
+  dynamic content = loadYaml(yamlContent);
+  String version = content['version'];
+  //rename version
+
+  Version resultVersion = VersionTool.fromText(version).nextPatchTag('dev');
+
+  String result = yamlContent.replaceFirst(version, resultVersion.toString());
+  await File(yamlPath).writeAsString(result);
+}
+
 @Task()
 Future<String> getVersion() async {
   String projectPath = Directory('.').absolute.path;