fix compile error

Author: jwu

.gitignore

@@ -29,3 +29,5 @@ profile
 node_modules
 bower_components
 dist
+yarn.lock
+package-lock.json

lib/bits.js

@@ -8,7 +8,6 @@
  */
 
 'use strict';
-'use restrict';
 
 // Number of bits in an integer
 export const INT_BITS = 32;

package.json

@@ -3,7 +3,7 @@
   "version": "1.4.7",
   "description": "Yet another gl-matrix: faster and smaller",
   "main": "dist/vmath.js",
-  "module" : "index.js",
+  "module": "index.js",
   "jsnext:main": "index.js",
   "scripts": {
     "prepare": "npm run build",
@@ -34,9 +34,10 @@
   "devDependencies": {
     "documentation": "^4.0.0-beta.19",
     "fs-jetpack": "^0.13.2",
-    "rollup": "^0.41.4",
+    "rollup": "^0.54.1",
+    "rollup-plugin-buble": "^0.18.0",
     "tap": "^10.3.0",
-    "uglify-es": "^3.0.15"
+    "uglify-js": "^3.3.7"
   },
   "files": [
     "dist",

script/rollup.config.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const fsJetpack = require('fs-jetpack');
+const buble = require('rollup-plugin-buble');
 const pjson = require('../package.json');
 
 let banner = `
@@ -13,20 +14,35 @@ let banner = `
 
 let dest = './dist';
 let file = 'vmath';
-let moduleName = 'vmath';
+let name = 'vmath';
+let sourcemap = true;
+let globals = {};
 
 // clear directory
 fsJetpack.dir(dest, { empty: true });
 
 module.exports = {
-  entry: './index.js',
-  targets: [
-    { dest: `${dest}/${file}.dev.js`, format: 'iife' },
-    { dest: `${dest}/${file}.js`, format: 'cjs' },
-  ],
-  moduleName,
-  banner,
+  input: './index.js',
   external: [],
-  globals: {},
-  sourceMap: true,
+  plugins: [
+    buble()
+  ],
+  output: [
+    {
+      file: `${dest}/${file}.dev.js`,
+      format: 'iife',
+      name,
+      banner,
+      sourcemap,
+      globals,
+    },
+    {
+      file: `${dest}/${file}.js`,
+      format: 'cjs',
+      name,
+      banner,
+      sourcemap,
+      globals,
+    },
+  ],
 };