fix(deps): update dependency stnl to v1.2.3

Author: renovate[bot]

package-lock.json

@@ -80,7 +80,7 @@
     "runtypes": "6.7.0",
     "simple-runtypes": "7.1.3",
     "spectypes": "2.1.11",
-    "stnl": "1.1.6",
+    "stnl": "1.2.3",
     "succulent": "0.18.1",
     "superstruct": "2.0.2",
     "suretype": "2.4.1",