docs(deps): update dependency mathjs to v8 (#464)

Author: renovate-bot

packages/google-cloud-automl/samples/package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "@google-cloud/automl": "^2.3.0",
     "csv": "^5.1.3",
-    "mathjs": "^7.0.0",
+    "mathjs": "^8.0.0",
     "yargs": "^16.0.0"
   },
   "devDependencies": {