tsconfig.json: disable class fields

Author: Sergey Khomushin

tsconfig.json

@@ -5,8 +5,7 @@
     "lib": ["ESNext", "DOM"],
     "typeRoots": ["node_modules/@types"],
     "moduleResolution": "node",
-    "emitDecoratorMetadata": true,
-    "experimentalDecorators": true,
+    "useDefineForClassFields": false,
     "declaration": true,
     "strict": true,
     "noImplicitAny": true,