fix: upgrade core-js from 3.14.0 to 3.15.2

Snyk has created this PR to upgrade core-js from 3.14.0 to 3.15.2.

See this package in npm:
https://www.npmjs.com/package/core-js

See this project in Snyk:
https://app.snyk.io/org/bluewallet/project/29c066bc-abce-44d9-b68e-064466e610e7?utm_source=github&utm_medium=upgrade-pr

package-lock.json

@@ -2223,9 +2223,9 @@
       "optional": true
     },
     "core-js": {
-      "version": "3.14.0",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.14.0.tgz",
-      "integrity": "sha512-3s+ed8er9ahK+zJpp9ZtuVcDoFzHNiZsPbNAAE4KXgrRHbjSqqNN6xGSXq6bq7TZIbKj4NLrLb6bJ5i+vSVjHA=="
+      "version": "3.15.2",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.15.2.tgz",
+      "integrity": "sha512-tKs41J7NJVuaya8DxIOCnl8QuPHx5/ZVbFo1oKgVl1qHFBBrDctzQGtuLjPpRdNTWmKPH6oEvgN/MUID+l485Q=="
     },
     "core-js-compat": {
       "version": "3.15.2",

package.json

@@ -23,7 +23,7 @@
     "bignumber.js": "^9.0.1",
     "bitcoinjs-lib": "^5.2.0",
     "bolt11": "^1.3.2",
-    "core-js": "^3.14.0",
+    "core-js": "^3.15.2",
     "eslint": "^7.24.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^3.4.0",