Bump es6-promise from 4.2.4 to 4.2.8 (#7539)

Bumps [es6-promise](https://github.com/stefanpenner/es6-promise) from 4.2.4 to 4.2.8.
- [Release notes](https://github.com/stefanpenner/es6-promise/releases)
- [Changelog](https://github.com/stefanpenner/es6-promise/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stefanpenner/es6-promise/compare/v4.2.4...v4.2.8)

---
updated-dependencies:
- dependency-name: es6-promise
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -27,7 +27,7 @@
     "core-js": "3",
     "date-fns": "^2.25.0",
     "es6-object-assign": "1.1.0",
-    "es6-promise": "4.2.4",
+    "es6-promise": "4.2.8",
     "expect": "1.20.2",
     "express": "4.16.3",
     "file-saver": "1.3.8",

yarn.lock

@@ -6814,10 +6814,10 @@ es6-object-assign@1.1.0:
   resolved "https://registry.npmjs.org/es6-object-assign/-/es6-object-assign-1.1.0.tgz"
   integrity sha1-wsNYJlYkfDnqEHyx5mUrb58kUjw=
 
-es6-promise@4.2.4:
-  version "4.2.4"
-  resolved "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.4.tgz"
-  integrity sha512-/NdNZVJg+uZgtm9eS3O6lrOLYmQag2DjdEXuPaHlZ6RuVqgqaVZfgYCepEIKsLqwdQArOPtC3XzRLqGGfT8KQQ==
+es6-promise@4.2.8:
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.8.tgz#4eb21594c972bc40553d276e510539143db53e0a"
+  integrity sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==
 
 es6-shim@^0.35.5:
   version "0.35.6"