[Dependencies] Add zlib

package.json

@@ -18,7 +18,8 @@
     "mongodb": "^3.2.4",
     "number-to-words": "^1.2.4",
     "request": "^2.88.0",
-    "ws": "^7.0.0"
+    "ws": "^7.0.0",
+    "zlib": "^1.0.5"
   },
   "devDependencies": {
     "@babel/cli": "^7.4.4",

yarn.lock

@@ -3783,3 +3783,8 @@ yallist@^3.0.0, yallist@^3.0.2:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.3.tgz#b4b049e314be545e3ce802236d6cd22cd91c3de9"
   integrity sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==
+
+zlib@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/zlib/-/zlib-1.0.5.tgz#6e7c972fc371c645a6afb03ab14769def114fcc0"
+  integrity sha1-bnyXL8NxxkWmr7A6sUdp3vEU/MA=