Add UMD build

Author: Brandon Dail

Makefile

@@ -0,0 +1,3 @@
+uglify:
+	./node_modules/.bin/uglifyjs dist/tinytime.js -cm toplevel -o dist/tinytime.min.js -p relative --source-map dist/tinytime.js.map
+	./node_modules/.bin/uglifyjs dist/tinytime.umd.js -cm toplevel -o dist/tinytime.umd.min.js -p relative --source-map dist/tinytime.umd.js.map

package.json

@@ -6,8 +6,10 @@
   "main": "dist/tinytime.js",
   "umd:main": "dist/tinytime.umd.js",
   "scripts": {
-    "rollup": "NODE_ENV=production rollup -c rollup.config.js -m -f cjs -n $npm_package_amdName $npm_package_jsnext_main -o $npm_package_main",
-    "minify": "uglifyjs $npm_package_main -cm toplevel -o $npm_package_main -p relative --in-source-map ${npm_package_main}.map --source-map ${npm_package_main}.map",
+    "rollup:cjs": "NODE_ENV=production rollup -c rollup.config.js -m -f cjs -n $npm_package_amdName $npm_package_jsnext_main -o $npm_package_main",
+    "rollup:umd": "NODE_ENV=production rollup -c rollup.config.js -m -f umd -n $npm_package_amdName $npm_package_jsnext_main -o dist/tinytime.umd.js",
+    "rollup": "npm run rollup:cjs && npm run rollup:umd",
+    "minify": "make uglify",
     "build": "npm run rollup && npm run minify && gzip-size dist/tinytime.js | pretty-bytes",
     "test": "NODE_ENV=test flow && jest",
     "prepublish": "npm run build"