Fix filtering of vim swap files

Path is the whole path, not just the basename, and there is no
advantage to extracting the basename first instead of just adjusting
the regex like this

lib/index.js

@@ -194,7 +194,7 @@ FSWatcher.prototype._throttle = function(action, path, timeout) {
 FSWatcher.prototype._isIgnored = function(path, stats) {
   if (
     this.options.atomic &&
-    /^\..*\.(sw[px])$|\~$|\.subl.*\.tmp/.test(path)
+    /\..*\.(sw[px])$|\~$|\.subl.*\.tmp/.test(path)
   ) return true;
   var userIgnored = anymatch(this._globIgnored.concat(this.options.ignored));
   return userIgnored([path, stats]);