chore(deps): update dependency artillery to v2

Author: renovate[bot]

package.json

@@ -46,7 +46,7 @@
     "apollo-server": "3.13.0",
     "apollo-server-express": "3.13.0",
     "apollo-datasource-rest": "3.7.0",
-    "artillery": "1.7.9",
+    "artillery": "2.0.21",
     "benchmark": "2.1.4",
     "babel-plugin-parameter-decorator": "1.0.16",
     "babel-plugin-transform-typescript-metadata": "0.3.2",