update package.json

Author: lukeapage

package.json

@@ -6,7 +6,7 @@
   "author"        : "Alexis Sellier <[email protected]>",
   "contributors"  : ["The Core Less Team"],
   "version"       : "1.4.0",
-  "jam"           : { "main": "./dist/less-1.4.0-alpha.js" },
+  "jam"           : { "main": "./dist/less-1.4.0-beta.js" },
   "bin"           : { "lessc": "./bin/lessc" },
   "main"          : "./lib/less/index",
   "directories"   : { "test": "./test" },