code: function webpackCache(e) {
  		var keys = Object.keys(webpackConfig.cache);
  		var key, matchedKey;
  		for (var keyIndex = 0; keyIndex < keys.length; keyIndex++) {
  			key = keys[keyIndex];
  			if (key.indexOf(e.path) !== -1) {
  				matchedKey = key;
  				break;
  			}
  		}
  		if (matchedKey) {
  			delete webpackConfig.cache[matchedKey];
  		}
  	}
docs: Because webpackCompiler.watch() isn't being used
  manually remove the changed file path from the cache