Fix repository URL in package.json (#622)

Author: ExplodingCabbage

package.json

@@ -23,7 +23,7 @@
   "license": "BSD-3-Clause",
   "repository": {
     "type": "git",
-    "url": "git://github.com/kpdecker/jsdiff.git"
+    "url": "https://github.com/kpdecker/jsdiff.git"
   },
   "engines": {
     "node": ">=0.3.1"