Temp fix for using typings/tsd in jspm module: system environment

typings.js

// Run this after you update your typings.
const gulp = require('gulp');
const replace = require('gulp-replace');

gulp.task('es6-typings', () => {
  var srcPath = 'typings/browser/**/*'; // or 'typings/main/**/*' or 'typings/**/*' if you use `tsd`
  gulp.src(srcPath, { base: './' })
    .pipe(replace('export =', 'export default'))
    .pipe(gulp.dest('./'));
});