style(editorconfig): Add json rule to editor config (#297)

We aggreed to use 2 indent size in json files. The reason is npm use 2 indent in package.json and this is the defacto

.editorconfig

@@ -9,3 +9,6 @@ indent_style = space
 endofline = lf
 trim_trailing_whitespace = true
 insert_final_newline = true
+
+[*.json]
+indent_size = 2

tsconfig.json

@@ -9,5 +9,10 @@
     "removeComments": false,
     "noImplicitAny": true,
     "suppressImplicitAnyIndexErrors": true
-  }
+  },
+  "exclude": [
+    "./node_modules",
+    ".electron/dist",
+    "./dist"
+  ]
 }