add typescript dev dependency

Author: juliangruber

package-lock.json

@@ -11,7 +11,8 @@
   },
   "devDependencies": {
     "prettier-standard": "^16.4.1",
-    "standard": "^16.0.4"
+    "standard": "^16.0.4",
+    "typescript": "^4.6.3"
   },
   "dependencies": {
     "string.prototype.replaceall": "^1.0.6"