fix: site/.snyk & site/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746

Author: snyk-bot

site/package.json

@@ -15,7 +15,8 @@
     "react-scroll-trigger": "^0.6.1",
     "react-target-scroller": "^0.1.3",
     "react-timecode": "^1.1.3",
-    "tweenkle": "^0.2.2"
+    "tweenkle": "^0.2.2",
+    "snyk": "^1.316.1"
   },
   "scripts": {
     "build-css": "node-sass-chokidar src/ -o src/",
@@ -25,7 +26,9 @@
     "build-js": "react-scripts build",
     "build": "npm-run-all build-css build-js && rm -rf ../docs && mv build ../docs",
     "test": "react-scripts test --env=jsdom",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "snyk-protect": "snyk protect",
+    "prepare": "yarn run snyk-protect"
   },
   "devDependencies": {
     "node-sass-chokidar": "^1.3.0"
@@ -44,5 +47,6 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
-  }
+  },
+  "snyk": true
 }