chore: bundle distros with rollup

Closes #3

.eslintignore

@@ -0,0 +1 @@
+dist

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 coverage
+dist

.npmignore

@@ -3,4 +3,6 @@ test
 coverage
 .github
 karma.config.js
-.babelrc
+.babelrc
+!dist
+tasks

karma.distro.js

@@ -0,0 +1,41 @@
+// configures browsers to run test against
+// any of [ 'ChromeHeadless', 'Chrome', 'Firefox', 'Safari' ]
+var browsers = (process.env.TEST_BROWSERS || 'ChromeHeadless').split(',');
+
+// use puppeteer provided Chrome for testing
+process.env.CHROME_BIN = require('puppeteer').executablePath();
+
+var VARIANT = process.env.VARIANT;
+
+var NODE_ENV = process.env.NODE_ENV;
+
+
+module.exports = function(karma) {
+  karma.set({
+
+    basePath: '.',
+
+    frameworks: [
+      'mocha',
+      'sinon-chai'
+    ],
+
+    files: [
+      'dist/' + VARIANT + '.' + (NODE_ENV === 'production' ? 'production.min' : 'development') + '.js',
+      { pattern: 'test/fixtures/diagram.bpmn', included: false },
+      { pattern: 'dist/assets/**/*', included: false },
+      'test/distro/helper.js',
+      'test/distro/' + VARIANT + '.js'
+    ],
+
+    reporters: [ 'progress' ],
+
+    browsers,
+
+    browserNoActivityTimeout: 30000,
+
+    singleRun: true,
+    autoWatch: false
+  });
+
+};

lib/base/Modeler.js

@@ -20,7 +20,7 @@ import propertiesProviderModule from 'bpmn-js-properties-panel/lib/provider/bpmn
  *
  * @param {Object} options
  */
-export default function Modeler(options) {
+export default function Modeler(options = {}) {
 
   this._injectOriginModule(options);
 

lib/camunda-cloud/Modeler.js

@@ -23,7 +23,7 @@ import zeebeModdleExtension from 'zeebe-bpmn-moddle/lib';
  *
  * @param {Object} options
  */
-export default function Modeler(options) {
+export default function Modeler(options = {}) {
 
   options = {
     ...options,

lib/camunda-platform/Modeler.js

@@ -13,7 +13,7 @@ import camundaModdleExtension from 'camunda-bpmn-moddle/lib';
  *
  * @param {Object} options
  */
-export default function Modeler(options) {
+export default function Modeler(options = {}) {
 
   options = {
     ...options,