Update Chai to v4.5.0 (#383)

* Update Chai to v4.4.1

* Bump to 4.5

Author: afischer

package-lock.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "@google-cloud/datastore": "^5.1.0",
     "cache-manager": "^3.3.0",
-    "chai": "^4.2.0",
+    "chai": "^4.5.0",
     "cheerio": "^1.0.0-rc.3",
     "deepmerge": "^4.2.2",
     "ejs": "^3.1.7",