config: add browserslist to package.json

package.json

@@ -39,6 +39,11 @@
   ],
   "author": "Yehor Potebenko <hitechnic.uu68@gmail.com>",
   "license": "ISC",
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not op_mini all"
+  ],
   "bugs": {
     "url": "https://github.com/HobiHo180294/lets-do/issues"
   },
@@ -79,4 +84,4 @@
     "@babel/polyfill": "^7.12.1",
     "normalize.css": "^8.0.1"
   }
-}
+}
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