fix: package.json to reduce vulnerabilities (#589)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908

Co-authored-by: snyk-bot <[email protected]>

Author: twilio-product-security

package.json

@@ -13,14 +13,14 @@
     "@types/dotenv": "^8.2.0",
     "@types/express": "^4.17.11",
     "@types/fscreen": "^1.0.1",
-    "@types/jest": "^24.9.1",
+    "@types/jest": "^25.1.0",
     "@types/linkify-it": "^3.0.0",
     "@types/lodash.throttle": "^4.1.6",
     "@types/node": "^12.12.26",
     "@types/react": "^16.9.19",
     "@types/react-dom": "^16.9.5",
     "@types/react-router-dom": "^5.1.3",
-    "concurrently": "^5.1.0",
+    "concurrently": "^6.0.0",
     "copyfiles": "2.4.1",
     "cross-env": "^7.0.2",
     "d3-timer": "^1.0.10",