message: added bem.css to target package.json
diff: @@ -172,6 +172,8 @@ module.exports = function(options) {
  files: [
  "survey.css",
  "survey.min.css",
  + "bem.css",
  + "bem.min.css",
  "survey." + options.platformPrefix + ".d.ts",
  "survey." + options.platformPrefix + ".js",
  "survey." + options.platformPrefix + ".min.js"
  