Add libs to tsconfig

client/src/tsconfig.app.json

@@ -4,7 +4,13 @@
     "outDir": "../out-tsc/app",
     "baseUrl": "./",
     "module": "es2015",
-    "types": []
+    "types": [],
+    "lib": [
+      "es2017",
+      "es2016",
+      "es2015",
+      "dom"
+    ]
   },
   "exclude": [
     "test.ts",

client/tsconfig.json

@@ -13,6 +13,8 @@
     ],
     "lib": [
       "es2017",
+      "es2016",
+      "es2015",
       "dom"
     ],
     "baseUrl": "src",