Update test packages

Author: kunalkapadia

.istanbul.yml

@@ -1,6 +1,6 @@
 verbose: false
 instrumentation:
-  excludes: ['dist/**', 'coverage/**', 'gulpfile.babel.js']
+  excludes: ['dist/**', 'coverage/**', 'index.js']
   include-all-sources: true
 reporting:
     print: summary

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "8.2"
+  - "8.4"
 services:
   - mongodb
 cache:

Dockerfile

@@ -1,5 +1,5 @@
 # Use latest node version 8.x
-FROM node:8
+FROM node:8.4.0
 
 MAINTAINER Kunal Kapadia <kunalkapadia12@gmail.com>
 

package.json

@@ -6,7 +6,7 @@
   "main": "index.js",
   "private": false,
   "engines": {
-    "node": ">=8.2.1",
+    "node": ">=8.4.0",
     "npm": ">=5.3.0",
     "yarn": ">=0.27.5"
   },
@@ -61,19 +61,19 @@
     "winston": "2.3.0"
   },
   "devDependencies": {
-    "chai": "^3.4.1",
+    "chai": "4.1.0",
     "commitizen": "^2.9.2",
     "coveralls": "^2.11.6",
-    "cross-env": "3.1.3",
+    "cross-env": "5.0.1",
     "cz-conventional-changelog": "1.2.0",
     "eslint": "3.16.1",
     "eslint-config-airbnb-base": "7.1.0",
     "eslint-plugin-import": "1.16.0",
     "eslint-watch": "2.1.14",
     "husky": "^0.13.1",
     "istanbul": "1.1.0-alpha.1",
-    "mocha": "3.2.0",
-    "supertest": "2.0.1",
+    "mocha": "3.4.2",
+    "supertest": "3.0.0",
     "supertest-as-promised": "4.0.2",
     "validate-commit-msg": "^2.6.1"
   },
@@ -82,14 +82,5 @@
     "commitizen": {
       "path": "./node_modules/cz-conventional-changelog"
     }
-  },
-  "babel": {
-    "presets": [
-      "es2015",
-      "stage-2"
-    ],
-    "plugins": [
-      "add-module-exports"
-    ]
   }
 }