Update dependency chai to v4.3.4

Author: renovate-bot

package.json

@@ -9,11 +9,11 @@
         "@types/qlik-engineapi": "12.67.6",
         "@types/qlik-visualizationextensions": "4.0.2",
         "@types/mocha": "5.2.5",
-        "@types/chai": "4.1.7",
+        "@types/chai": "4.2.16",
         "typescript": "3.2.1",
         "gulp": "3.9.1",
         "gulp-less": "4.0.1",
-        "chai": "4.2.0",
+        "chai": "4.3.4",
         "mocha": "5.2.0"
     },
     "dependencies": {