Update dependencies and bump to 0.4.2

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gulp-shell",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "A handy command line interface for gulp",
   "main": "index.js",
   "scripts": {
@@ -24,18 +24,18 @@
   },
   "homepage": "https://github.com/sun-zheng-an/gulp-shell",
   "devDependencies": {
-    "chai": "~2.1.1",
+    "chai": "~2.3.0",
     "coveralls": "~2.11.2",
-    "eslint": "~0.16.2",
-    "gulp": "~3.8.11",
-    "istanbul": "~0.3.7",
-    "mocha": "~2.2.1",
+    "eslint": "~0.22.1",
+    "gulp": "~3.9.0",
+    "istanbul": "~0.3.14",
+    "mocha": "~2.2.5",
     "mocha-lcov-reporter": "0.0.2"
   },
   "dependencies": {
-    "async": "~0.9.0",
-    "gulp-util": "~3.0.4",
-    "lodash": "~3.5.0",
-    "through2": "~0.6.3"
+    "async": "~1.2.0",
+    "gulp-util": "~3.0.5",
+    "lodash": "~3.9.3",
+    "through2": "~0.6.5"
   }
 }