fet: allow ^ versions for yargs packages

Author: JoshuaKGoldberg

package-lock.json

@@ -68,9 +68,9 @@
     "strip-json-comments": "3.1.1",
     "supports-color": "8.1.1",
     "workerpool": "6.2.1",
-    "yargs": "16.2.0",
-    "yargs-parser": "20.2.4",
-    "yargs-unparser": "2.0.0"
+    "yargs": "^16.2.0",
+    "yargs-parser": "^20.2.4",
+    "yargs-unparser": "^2.0.0"
   },
   "devDependencies": {
     "@11ty/eleventy": "^1.0.0",