chore(deps): bump @babel/polyfill from 7.10.4 to 7.12.1

Bumps [@babel/polyfill](https://github.com/babel/babel/tree/HEAD/packages/babel-polyfill) from 7.10.4 to 7.12.1.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.1/packages/babel-polyfill)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -8,7 +8,7 @@
     "url": "https://github.com/cycle2work/c2w-lambda-users"
   },
   "dependencies": {
-    "@babel/polyfill": "^7.10.4",
+    "@babel/polyfill": "^7.12.1",
     "bluebird": "^3.5.1",
     "bunyan": "^1.8.14",
     "mongodb": "^3.5.9",

yarn.lock

@@ -763,10 +763,10 @@
     "@babel/helper-create-regexp-features-plugin" "^7.10.4"
     "@babel/helper-plugin-utils" "^7.10.4"
 
-"@babel/polyfill@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/polyfill/-/polyfill-7.10.4.tgz#915e5bfe61490ac0199008e35ca9d7d151a8e45a"
-  integrity sha512-8BYcnVqQ5kMD2HXoHInBH7H1b/uP3KdnwCYXOqFnXqguOyuu443WXusbIUbWEfY3Z0Txk0M1uG/8YuAMhNl6zg==
+"@babel/polyfill@^7.12.1":
+  version "7.12.1"
+  resolved "https://registry.yarnpkg.com/@babel/polyfill/-/polyfill-7.12.1.tgz#1f2d6371d1261bbd961f3c5d5909150e12d0bd96"
+  integrity sha512-X0pi0V6gxLi6lFZpGmeNa4zxtwEmCs42isWLNjZZDE0Y8yVfgu0T2OAHlzBbdYlqbW/YXVvoBHpATEM+goCj8g==
   dependencies:
     core-js "^2.6.5"
     regenerator-runtime "^0.13.4"