"version" attribute is not necessary for bower

Closes js-cookiegh-44.

Author: FagnerMartinsBrack

README.md

@@ -235,13 +235,13 @@ Check out the [Contributing Guidelines](CONTRIBUTING.md)
 
 ## Manual release steps
 
-* Remove the "-pre" suffix of the "version" attribute of `bower.json` and `package.json`
+* Remove the "-pre" suffix of the "version" attribute of `package.json`
 * Remove the "-pre" suffix of the version number in the `src/js.cookie.js` file
 * Commit with the message "Release version x.x.x"
 * Create version tag in git
 * Create a github release and upload the minified file
 * Release on npm
-* Increment and add the "-pre" suffix to the "version" attribute of `bower.json` and `package.json`
+* Increment and add the "-pre" suffix to the "version" attribute of `package.json`
 * Increment and add the "-pre" suffix to the version number in the `src/js.cookie.js` file
 * Link the documentation of the latest release tag in the `README.md`
 * Commit with the message "Prepare for the next development iteration"

bower.json

@@ -1,6 +1,5 @@
 {
   "name": "js-cookie",
-  "version": "2.0.0-pre",
   "main": [
     "src/js.cookie.js"
   ],