Bump react-intl from 3.3.2 to 3.4.0

Bumps [react-intl](https://github.com/formatjs/react-intl) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/formatjs/react-intl/releases)
- [Changelog](https://github.com/formatjs/react-intl/blob/master/CHANGELOG.md)
- [Commits](formatjs/formatjs@v3.3.2...v3.4.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -201,7 +201,7 @@
     "query-string": "6.8.3",
     "react": "16.11.0",
     "react-dom": "16.10.2",
-    "react-intl": "3.3.2",
+    "react-intl": "3.4.0",
     "react-markdown": "4.2.2",
     "react-progress-bar.js": "0.2.3",
     "react-redux": "^5.0.6",