chore(deps): update dependency ts-standardx to v0.8.4

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
     "mocha": "8.2.1",
     "rimraf": "3.0.2",
     "rollup": "2.37.1",
-    "ts-standardx": "0.5.2-0",
+    "ts-standardx": "0.8.4",
     "vinyl": "2.2.1"
   }
 }