3.9.3 version bumps.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@30474 602fd350-edb4-49c9-b593-d223f7449a82
package.json bump.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@30476 602fd350-edb4-49c9-b593-d223f7449a82