fix(deps): update dependency mathjs to v15 [security]

Author: renovate-bot

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

@@ -18,7 +18,7 @@
   "dependencies": {
     "@google-cloud/automl": "^5.1.1",
     "csv": "^6.0.0",
-    "mathjs": "^14.0.0",
+    "mathjs": "^15.2.0",
     "yargs": "^17.0.0"
   },
   "devDependencies": {

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

@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@google-cloud/automl": "^5.0.0",
-    "mathjs": "^14.0.0",
+    "mathjs": "^15.2.0",
     "@google-cloud/language": "^7.2.1",
     "@google-cloud/storage": "^7.0.0",
     "yargs": "^17.0.0"