Bump @date-io/date-fns from 1.3.13 to 3.0.0 in /flowauth/frontend

Bumps [@date-io/date-fns](https://github.com/dmtrKovalenko/date-io) from 1.3.13 to 3.0.0.
- [Release notes](https://github.com/dmtrKovalenko/date-io/releases)
- [Commits](dmtrKovalenko/date-io@v1.3.13...v3.0.0)

---
updated-dependencies:
- dependency-name: "@date-io/date-fns"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

flowauth/frontend/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@date-io/date-fns": "^1.3.13",
+    "@date-io/date-fns": "^3.0.0",
     "@material-ui/core": "^4.12.4",
     "@material-ui/icons": "^4.11.3",
     "@material-ui/pickers": "^3.3.11",