Add missing test dependencies

The usage of lerna bootstrap --hoist meant these dependencies being
missing went unnoticed.

test/package.json

@@ -9,6 +9,11 @@
     "@clusterio/lib": "2.0.0-alpha.5",
     "@clusterio/master": "2.0.0-alpha.5",
     "@clusterio/slave": "2.0.0-alpha.5",
+    "body-parser": "^1.18.2",
+    "express": "^4.16.2",
+    "fs-extra": "^8.1.0",
+    "jsonwebtoken": "^8.2.1",
+    "jszip": "^3.2.2",
     "node-forge": "^0.10.0",
     "phin": "^3.5.1"
   }