Add caret for dependencies

no issue

- reduce the number of dependencies installed in a project

package.json

@@ -32,35 +32,35 @@
     "gscan": "./bin/cli.js"
   },
   "dependencies": {
-    "bluebird": "3.4.6",
-    "chalk": "1.1.1",
-    "commander": "2.9.0",
+    "bluebird": "^3.4.6",
+    "chalk": "^1.1.1",
+    "commander": "^2.9.0",
     "express": "^4.16.2",
-    "express-hbs": "1.0.3",
+    "express-hbs": "^1.0.3",
     "extract-zip": "^1.6.5",
-    "fs-extra": "0.26.2",
+    "fs-extra": "^0.26.2",
     "ghost-ignition": "^2.8.16",
-    "glob": "7.0.5",
+    "glob": "^7.0.5",
     "lodash": "4.17.4",
-    "multer": "1.1.0",
+    "multer": "^1.1.0",
     "require-dir": "^0.3.2",
     "semver": "^5.3.0",
     "uuid": "^3.0.0",
     "validator": "^6.3.0"
   },
   "devDependencies": {
-    "grunt": "0.4.5",
-    "grunt-cli": "0.1.13",
-    "grunt-mocha-istanbul": "3.0.1",
-    "grunt-release": "0.13.0",
-    "grunt-shipit": "1.0.0",
-    "istanbul": "0.4.1",
-    "mocha": "2.4.5",
-    "nodemon": "1.11.0",
-    "rewire": "2.5.2",
-    "shipit-deploy": "2.1.3",
-    "should": "7.1.0",
-    "sinon": "1.17.5"
+    "grunt": "^0.4.5",
+    "grunt-cli": "^0.1.13",
+    "grunt-mocha-istanbul": "^3.0.1",
+    "grunt-release": "^0.13.0",
+    "grunt-shipit": "^1.0.0",
+    "istanbul": "^0.4.1",
+    "mocha": "^2.4.5",
+    "nodemon": "^1.11.0",
+    "rewire": "^2.5.2",
+    "shipit-deploy": "^2.1.3",
+    "should": "^7.1.0",
+    "sinon": "^1.17.5"
   },
   "files": [
     "lib",