produce UMD

.babelrc

@@ -1 +1,4 @@
-{}
+{
+  "presets": ["es2015"],
+  "plugins": ["transform-es2015-modules-umd"]
+}

gulpfile.js

@@ -17,7 +17,7 @@ var jsdoc = require('gulp-jsdoc3');
 require('babel-core/register');
 
 gulp.task('static', function () {
-  return gulp.src('**/*.js')
+  return gulp.src(['lib/**/*.js', 'test/**/*.js'])
     .pipe(excludeGitignore())
     .pipe(eslint())
     .pipe(eslint.format())

package.json

@@ -17,25 +17,27 @@
     ""
   ],
   "devDependencies": {
-    "babel-core": "^5.5.0",
+    "babel-core": "^6.10.4",
     "babel-eslint": "^4.1.8",
+    "babel-plugin-transform-es2015-modules-umd": "^6.8.0",
+    "babel-preset-es2015": "^6.9.0",
     "chai": "^3.5.0",
     "del": "^2.0.2",
     "eslint": "^2.1.0",
     "eslint-config-xo-space": "^0.13.0",
     "eslint-plugin-babel": "^3.1.0",
     "gulp": "^3.9.0",
-    "gulp-babel": "^5.1.0",
+    "gulp-babel": "^6.1.2",
     "gulp-coveralls": "^0.1.0",
     "gulp-eslint": "^2.0.0",
     "gulp-exclude-gitignore": "^1.0.0",
-    "gulp-istanbul": "^0.10.3",
+    "gulp-istanbul": "^1.0.0",
     "gulp-jsdoc3": "^0.3.0",
     "gulp-line-ending-corrector": "^1.0.1",
     "gulp-mocha": "^2.0.0",
     "gulp-nsp": "^2.1.0",
     "gulp-plumber": "^1.0.0",
-    "isparta": "^3.0.3"
+    "isparta": "^4.0.0"
   },
   "eslintConfig": {
     "extends": "xo-space",