fix(plugin): replace old browser args with a new launch options (#32)

BREAKING CHANGE: The `ensureRequiredBrowserFlags` method is no longer supported. It was renamed the `ensureBrowserFlags` and now it accepts the second argument as an [options](cypress-io/cypress#6306) object with an args property instead of an array of browser arguments.

Before:

```js
// cypress/plugins/index.js

const { install, ensureRequiredBrowserFlags } = require('@neuralegion/cypress-har-generator');

module.exports = (on, config) => {
  install(on, config);

  on('before:browser:launch', (browser = {}, args) =>
    ensureRequiredBrowserFlags(browser, args)
  );
};
```

After:

```js
// cypress/plugins/index.js

const { install, ensureBrowserFlags } = require('@neuralegion/cypress-har-generator');

module.exports = (on, config) => {
  install(on, config);

  on('before:browser:launch', (browser = {}, launchOptions) => {
    ensureBrowserFlags(browser, launchOptions);
    return launchOptions;
  });
};
```

closes #31

README.md

@@ -19,14 +19,15 @@ npm i --save-dev @neuralegion/cypress-har-generator
 Next, go to the cypress's directory and put this code is in your `cypress/plugins/index.js` file:
 
 ```js
-const { install, ensureRequiredBrowserFlags } = require('@neuralegion/cypress-har-generator');
+const { install, ensureBrowserFlags } = require('@neuralegion/cypress-har-generator');
 
 module.exports = (on, config) => {
   install(on, config);
 
-  on('before:browser:launch', (browser = {}, args) =>
-    ensureRequiredBrowserFlags(browser, args)
-  );
+  on('before:browser:launch', (browser = {}, launchOptions) => {
+    ensureBrowserFlags(browser, launchOptions);
+    return launchOptions;
+  });
 };
 ```
 

example/README.md

@@ -6,9 +6,9 @@ You can find test files in [cypress/integration](cypress/integration) folder.
 
 ## Install
 
-Run `npm i` to install dependencies.
+Run `npm ci` to install dependencies.
 
 
 ## How to run
 
-Run `npm run test` to trigger tests and run recording.
+Run `npm test` to trigger tests and run recording.

example/cypress/plugins/index.js

@@ -1,11 +1,10 @@
-const { install, ensureRequiredBrowserFlags } = require('../../../dist');
+const { install, ensureBrowserFlags } = require('../../../dist');
 
 module.exports = (on) => {
   install(on);
 
-  on('before:browser:launch', (browser = {}, args) => {
-    args = ensureRequiredBrowserFlags(browser, args);
-    args.push('--headless');
-    return args;
+  on('before:browser:launch', (browser = {}, launchOptions) => {
+    ensureBrowserFlags(browser, launchOptions);
+    return launchOptions;
   });
 };