Рефакторинг. Дорабавление новых опций.

.eslintrc.json

@@ -23,6 +23,12 @@
         "semi": [
             "error",
             "always"
-        ]
+        ],
+        "no-var": "error",
+        "no-multi-spaces": "error",
+        "space-in-parens": "error",
+        "no-multiple-empty-lines": "error",
+        "prefer-const": "error",
+        "no-use-before-define": "error"
     }
 }