style(import/extension): always require extension

Author: keithamus

.eslintrc.json

@@ -5,13 +5,7 @@
   "rules": {
     "no-invalid-this": "off",
     "@typescript-eslint/no-invalid-this": ["error"],
-    "import/extensions": [
-      "error",
-      "ignorePackages",
-      {
-        "ts": "never"
-      }
-    ],
+    "import/extensions": ["error", "ignorePackages"],
     "@typescript-eslint/consistent-type-imports": ["error", {"prefer": "type-imports"}]
   },
   "overrides": [