fix: upgrade @material-ui/core from 4.9.9 to 4.9.10 (#54)

Snyk has created this PR to upgrade @material-ui/core from 4.9.9 to 4.9.10.

See this package in NPM:
https://www.npmjs.com/package/@material-ui/core

See this project in Snyk:
https://app.snyk.io/org/johanneskonings/project/b30410ce-f052-409e-904e-a2e4798c61db?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -6,7 +6,7 @@
   "main": "dist/index.js",
   "dependencies": {
     "@date-io/date-fns": "^1.3.13",
-    "@material-ui/core": "4.9.9",
+    "@material-ui/core": "4.9.10",
     "@material-ui/icons": "4.9.1",
     "@material-ui/pickers": "^3.2.10",
     "aws-amplify": "2.3.0",