Update dependency static-type-assert to v4

Author: renovate-bot

package.json

@@ -28,6 +28,6 @@
   },
   "devDependencies": {
     "typescript": "~4.0.0",
-    "static-type-assert": "3.0.1"
+    "static-type-assert": "4.0.0"
   }
 }