var to let or const, better lints, code style and more

package.json

@@ -9,18 +9,19 @@
   "private": false,
   "contributors": [],
   "dependencies": {
-    "async": "^1.5.2",
-    "iconv-lite": "^0.4.13",
-    "moment": "^2.13.0",
+    "async": "^2.4.1",
+    "iconv-lite": "^0.4.18",
+    "moment": "^2.18.1",
     "utils-merge": "^1.0.0",
-    "winston": "^2.2.0"
+    "winston": "^2.3.1"
   },
   "description": "Simplified SMPP implementation",
   "devDependencies": {
     "coveralls": "^2.11.9",
-    "eslint": "^2.11.1",
+    "eslint": "^4.1.0",
     "istanbul": "^0.4.3",
-    "mocha": "^2.5.3",
+    "mocha": "^3.4.2",
+    "mocha-eslint": "^3.0.1",
     "portfinder": "^1.0.3"
   },
   "keywords": [
@@ -28,7 +29,7 @@
     "pdu",
     "sms"
   ],
-  "main": "larvitsmpp.js",
+  "main": "index.js",
   "repository": {
     "url": "https://github.com/larvit/larvitsmpp",
     "type": "git"