Replace browserify with rollup.

Author: alexjeffburke

package.json

@@ -9,9 +9,7 @@
     "unexpected-dom.min.js"
   ],
   "scripts": {
-    "bundle:browserify": "browserify lib/index.js --standalone unexpected.dom --debug --x jsdom > unexpected-dom.js",
-    "bundle:min": "uglifyjs unexpected-dom.js > unexpected-dom.min.js",
-    "bundle": "npm run bundle:browserify && npm run bundle:min",
+    "bundle": "rollup -c",
     "build": "babel --out-dir lib --quiet src",
     "build-tests": "babel --out-dir build/test --quiet test",
     "changelog": "offline-github-changelog > CHANGELOG.md",
@@ -49,7 +47,6 @@
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
     "babel-preset-env": "^1.7.0",
-    "browserify": "^16.2.3",
     "coveralls": "^3.0.2",
     "eslint": "^6.0.0",
     "eslint-config-prettier": "^6.0.0",
@@ -72,6 +69,12 @@
     "nyc": "^14.0.0",
     "offline-github-changelog": "^1.2.0",
     "prettier": "~1.18.2",
+    "rollup": "^1.0.2",
+    "rollup-plugin-commonjs": "^10.0.0",
+    "rollup-plugin-json": "^4.0.0",
+    "rollup-plugin-node-globals": "^1.4.0",
+    "rollup-plugin-node-resolve": "^5.0.0",
+    "rollup-plugin-terser": "^5.1.2",
     "uglifyjs": "^2.4.11",
     "unexpected": "^11.6.1",
     "unexpected-documentation-site-generator": "^6.0.0",

rollup.config.js

@@ -0,0 +1,35 @@
+var terser = require('rollup-plugin-terser').terser;
+
+var plugins = [
+  require('rollup-plugin-json')(),
+  require('rollup-plugin-commonjs')(),
+  require('rollup-plugin-node-resolve')(),
+  require('rollup-plugin-node-globals')()
+];
+
+module.exports = [
+  {
+    input: 'lib/index.js',
+    output: {
+      file: 'unexpected-dom.js',
+      name: 'unexpected.dom',
+      exports: 'named',
+      format: 'umd',
+      sourcemap: false,
+      strict: false
+    },
+    plugins
+  },
+  {
+    input: 'lib/index.js',
+    output: {
+      file: 'unexpected-dom.min.js',
+      name: 'unexpected.dom',
+      exports: 'named',
+      format: 'umd',
+      sourcemap: false,
+      strict: false
+    },
+    plugins: plugins.concat([terser()])
+  }
+];