Opt: Use user-friendly yaml in notify

module/config/argument/args.json

@@ -136,8 +136,8 @@
       },
       "OnePushConfig": {
         "type": "textarea",
-        "value": "{}",
-        "mode": "json"
+        "value": "provider: null",
+        "mode": "yaml"
       },
       "ScreenshotLength": {
         "type": "input",

module/config/argument/argument.yaml

@@ -45,8 +45,8 @@ Error:
   SaveError: true
   OnePushConfig:
     type: textarea
-    mode: json
-    value: '{}'
+    mode: yaml
+    value: 'provider: null'
   ScreenshotLength: 1
 Optimization:
   ScreenshotInterval: 0.3

module/config/config_generated.py

@@ -33,7 +33,7 @@ class GeneratedConfig:
     # Group `Error`
     Error_HandleError = True
     Error_SaveError = True
-    Error_OnePushConfig = '{}'
+    Error_OnePushConfig = 'provider: null'
     Error_ScreenshotLength = 1
 
     # Group `Optimization`