Bump react-intl from 2.9.0 to 3.1.8

Bumps [react-intl](https://github.com/formatjs/react-intl) from 2.9.0 to 3.1.8.
- [Release notes](https://github.com/formatjs/react-intl/releases)
- [Changelog](https://github.com/formatjs/react-intl/blob/master/CHANGELOG.md)
- [Commits](formatjs/formatjs@v2.9.0...v3.1.8)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -176,7 +176,7 @@
     "react-element-to-jsx-string": "14.3.1",
     "react-event-listener": "0.6.6",
     "react-inspector": "paritytech/react-inspector",
-    "react-intl": "2.9.0",
+    "react-intl": "3.1.8",
     "react-markdown": "4.3.1",
     "react-portal": "4.2.1",
     "react-qr-reader": "2.2.1",