Bump dependencies

package.json

@@ -33,16 +33,16 @@
     "prepublish": "gulp prepublish"
   },
   "dependencies": {
-    "async": "^0.9.0",
+    "async": "^1.4.2",
     "chalk": "^1.0.0",
     "class-extend": "^0.1.0",
     "cli-table": "^0.3.1",
-    "cross-spawn": "^1.0.3",
+    "cross-spawn": "^2.0.0",
     "dargs": "^4.0.0",
     "dateformat": "^1.0.11",
     "debug": "^2.1.0",
     "detect-conflict": "^1.0.0",
-    "diff": "^1.0.4",
+    "diff": "^2.0.2",
     "download": "^4.1.2",
     "findup-sync": "^0.2.1",
     "github-username": "^2.0.0",
@@ -58,17 +58,17 @@
     "nopt": "^3.0.0",
     "path-exists": "^1.0.0",
     "path-is-absolute": "^1.0.0",
-    "pretty-bytes": "^1.0.2",
+    "pretty-bytes": "^2.0.1",
     "read-chunk": "^1.0.1",
     "rimraf": "^2.2.0",
     "run-async": "^0.1.0",
     "shelljs": "^0.5.0",
     "sinon": "^1.9.1",
     "text-table": "^0.2.0",
-    "through2": "^0.6.3",
+    "through2": "^2.0.0",
     "underscore.string": "^3.0.3",
-    "user-home": "^1.1.0",
-    "xdg-basedir": "^1.0.0",
+    "user-home": "^2.0.0",
+    "xdg-basedir": "^2.0.0",
     "yeoman-assert": "^2.0.0",
     "yeoman-environment": "^1.1.0",
     "yeoman-welcome": "^1.0.0"
@@ -77,14 +77,14 @@
     "gulp": "^3.6.0",
     "gulp-coveralls": "^0.1.0",
     "gulp-exclude-gitignore": "^1.0.0",
-    "gulp-istanbul": "^0.8.1",
-    "gulp-jscs": "^1.1.0",
+    "gulp-istanbul": "^0.10.0",
+    "gulp-jscs": "^2.0.0",
     "gulp-jshint": "^1.5.3",
     "gulp-mocha": "^2.0.0",
     "gulp-nsp": "^0.4.5",
     "gulp-plumber": "^1.0.0",
     "jsdoc": "^3.3.0-beta1",
-    "jshint-stylish": "^1.0.0",
+    "jshint-stylish": "^2.0.1",
     "mockery": "^1.4.0",
     "nock": "^2.0.1",
     "nsp": "*",