Upgrade archiver to 0.4.10.

Recent versions of archiver fix bugs that can generate corrupt ZIPs,
so upgrade to the most recent version of archiver that also includes
a fix for this bug:

archiverjs/node-archiver#32

Keep specifying a specific archiver version to prevent glitches
caused by using different older or newer versions.

package.json

@@ -22,7 +22,7 @@
         "grunt-yui-contrib": "~0.0.4",
         "grunt-lib-contrib": "~0.5.3",
         "grunt-contrib-compress": "0.4.10",
-        "archiver": "0.4.5"
+        "archiver": "0.4.10"
     },
     "scripts": {
         "postinstall": "grunt build",