fix(deps): update dependency mathjs to v6 (#261)

renovate[bot] · JustinBeckwith · commit eeb2847eb7a8 · 2019-06-11T09:54:58.000-07:00
diff --git a/samples/package.json b/samples/package.json
@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@google-cloud/automl": "^1.0.0",
-    "mathjs": "^5.1.0",
+    "mathjs": "^6.0.0",
     "@google-cloud/language": "^3.2.0",
     "@google-cloud/storage": "^2.0.0",
     "yargs": "^13.0.0"
