day 4 done

package-lock.json

@@ -4,10 +4,26 @@
   "requires": true,
   "packages": {
     "": {
+      "dependencies": {
+        "@js-temporal/polyfill": "^0.4.4"
+      },
       "devDependencies": {
         "@types/node": "^22.10.1"
       }
     },
+    "node_modules/@js-temporal/polyfill": {
+      "version": "0.4.4",
+      "resolved": "https://registry.npmjs.org/@js-temporal/polyfill/-/polyfill-0.4.4.tgz",
+      "integrity": "sha512-2X6bvghJ/JAoZO52lbgyAPFj8uCflhTo2g7nkFzEQdXd/D8rEeD4HtmTEpmtGCva260fcd66YNXBOYdnmHqSOg==",
+      "license": "ISC",
+      "dependencies": {
+        "jsbi": "^4.3.0",
+        "tslib": "^2.4.1"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/@types/node": {
       "version": "22.10.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.10.1.tgz",
@@ -18,6 +34,18 @@
         "undici-types": "~6.20.0"
       }
     },
+    "node_modules/jsbi": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/jsbi/-/jsbi-4.3.0.tgz",
+      "integrity": "sha512-SnZNcinB4RIcnEyZqFPdGPVgrg2AcnykiBy0sHVJQKHYeaLUvi3Exj+iaPpLnFVkDPZIV4U0yvgC9/R4uEAZ9g==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "license": "0BSD"
+    },
     "node_modules/undici-types": {
       "version": "6.20.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.20.0.tgz",