use latest

package.json

@@ -8,12 +8,11 @@
   "description": "Operetta webmail backend",
   "dependencies": {
     "gen-thread": "latest",
-    "imap": "^0.8.17",
-    "imap-promise": "^1.0.2",
-    "mailparser": "^0.6.0",
-    "nodemailer": "^2.4.2",
-    "pg": "^6.0.1",
-    "pg-bricks": "^0.4.0"
+    "imap": "latest",
+    "mailparser": "latest",
+    "nodemailer": "latest",
+    "pg": "latest",
+    "pg-bricks": "latest"
   },
   "devDependencies": {
     "babel-cli": "^6.10.1",