[chore] Bump dependencies (#2926)

.travis.yml

@@ -1,28 +1,12 @@
 sudo: false
-before_install:
-  - npm install -g npm@'>=1.4.3'
 language: node_js
 node_js:
-  - "0.10"
-  - "0.12"
   - "4"
-  - "node"
+  - "6"
+  - "7"
 
 git:
   depth: 1
 
-matrix:
-  include:
-  - node_js: '0.10'
-    env: TEST_VERSION=compat
-  - node_js: '0.12'
-    env: TEST_VERSION=compat
-  - node_js: '4'
-    env: TEST_VERSION=compat
-#matrix:
-  #fast_finish: true
-  #allow_failures:
-    #- node_js: "0.11"
-
 notifications:
   irc: "irc.freenode.org#socket.io"

package.json

@@ -24,24 +24,24 @@
     "test": "gulp test"
   },
   "dependencies": {
-    "debug": "2.3.3",
-    "engine.io": "2.0.2",
-    "object-assign": "4.1.0",
+    "debug": "~2.6.6",
+    "engine.io": "~3.1.0",
+    "object-assign": "~4.1.1",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "socketio/socket.io-client",
     "socket.io-parser": "~3.1.1"
   },
   "devDependencies": {
-    "babel-preset-es2015": "6.3.13",
-    "del": "2.2.0",
+    "babel-preset-es2015": "^6.24.1",
+    "del": "^2.2.2",
     "expect.js": "0.3.1",
-    "gulp": "3.9.0",
-    "gulp-babel": "6.1.1",
-    "gulp-istanbul": "0.10.3",
-    "gulp-mocha": "2.2.0",
+    "gulp": "^3.9.1",
+    "gulp-babel": "^6.1.2",
+    "gulp-istanbul": "^1.1.1",
+    "gulp-mocha": "^4.3.1",
     "gulp-task-listing": "1.0.1",
-    "istanbul": "0.4.1",
-    "mocha": "2.3.4",
+    "istanbul": "^0.4.5",
+    "mocha": "^3.3.0",
     "superagent": "1.6.1",
     "supertest": "1.1.0"
   },