Update v3

[danielmorell]

Description of the change

This is a major update the WordPress plugin. It includes an overhaul of most everything. Here is a high level list of everything that changed.

• Fixed CSRF vulnerability.
• Removed support for PHP 8.0 and below.
• Updated and improved the settings page.
• Updated the Rollbar core PHP SDK to v4.1.
• Added support for telemetry and added auto-instrumentation.
• Added support for ROLLBAR_DISABLE_ADMIN to remove the plugin settings page from the admin.
• Added support for ROLLBAR_SETTINGS to configure the plugin without the admin page.
• Added support for ROLLBAR_CLIENT_ACCESS_TOKEN constant or environment variable to set the client access token.
• Added support for WP_PROXY_BYPASS_HOSTS, WP_PROXY_USERNAME, and WP_PROXY_PASSWORD for better proxy management.
• Added rollbar_api_admin_permission filter to allow custom authorization of the admin API.
• Added rollbar_disable_admin filter to allow custom disabling of the admin page.
• Added rollbar_php_config filter to allow more exact control over Rollbar PHP configurations.
• Added rollbar_telemetry_actions filter to allow control of which actions are logged via telemetry.
• Added rollbar_telemetry_custom_handlers filter to allow custom control over what is logged in telemetry messages.
• Added 'framework' details with the WordPress version to the item payload.
• Added unit tests.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

• Fix Rollbar plugin is vulnerable to Cross Site Request Forgery (CSRF) #126
• Fix Monitoring files out of date #124
• Fix WordPress misspelled #123
• Fix Update to use rollbar-php 4.0.1 (currently on 1.8.1) #122
• Fix Unable send test message on Rollbar #94

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer

[brianr]

First round of review - added a few comments/questions.

[toineenzo]

Just a heads up: perhaps you can take a look at the implementation / fix for the security issue in #129. It also has a nice markdown file with security advises