add new packages (express/helmet)

package.json

@@ -11,6 +11,8 @@
   "license": "AGPL-3.0",
   "private": false,
   "devDependencies": {
+    "@types/express": "^4.17.6",
+    "@types/helmet": "^0.0.46",
     "@types/mongoose": "^5.7.10",
     "@types/node": "^13.11.0",
     "@types/signale": "^1.4.1",
@@ -27,6 +29,8 @@
     "axios": "^0.19.2",
     "eris": "bsian03/eris#bsian",
     "eris-pagination": "bsian03/eris-pagination#dev",
+    "express": "^4.17.1",
+    "helmet": "^3.22.0",
     "moment": "^2.24.0",
     "mongoose": "^5.9.9",
     "signale": "^1.4.0",