Missing Admin class when installing with Composer.

[colourgarden]

Version information

• Plugin version : dev-master (via Composer)
• PHP : 7.1.26
• WordPress : 5.2.3
• ACF version : 5.6.10
• Polylang version : 2.3.10 (Polylang Pro)

Steps to reproduce

1. composer require wpackagist-plugin/acf-options-for-polylang
2. Activate plugin

Details

• Error: Uncaught Error: Class 'BEA\ACF_Options_For_Polylang\Admin' not found
• Shown because of missing classes/admin.php file when installing via Composer
• During Composer installation, Wordpress.org authentication error given and plugin rather installed from dist (GitHub?)

Failed to download wpackagist-plugin/acf-options-for-polylang from source: Package could not be downloaded,
svn: E170013: Unable to connect to a repository at URL 'https://plugins.svn.wordpress.org/acf-options-for-polylang/trunk'
svn: E230001: Server SSL certificate verification failed: issuer is not trusted

Now trying to download from dist

• If explicit version is given during install (composer require wpackagist-plugin/acf-options-for-polylang 1.1.7) then admin.php is installed and plugin works as expected