wordpress plugin update receives an stdclass instead of an array

[javorszky]

To reproduce:

• WP 4.8.2
• this plugin version 3.4.1
• update available: 3.4.2

1. go to plugins
2. find the plugin in the list with an update available
3. click the 'show details' link
4. observe that nothing happens
5. and that you have a fatal error:

[14-Nov-2017 13:29:22 UTC] PHP Fatal error:  Uncaught Error: Cannot use object of type stdClass as array in /Users/javorszky/Sites/hb/wp-admin/includes/plugin-install.php:501
Stack trace:
#0 /Users/javorszky/Sites/hb/wp-includes/class-wp-hook.php(298): install_plugin_information('')
#1 /Users/javorszky/Sites/hb/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array)
#2 /Users/javorszky/Sites/hb/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#3 /Users/javorszky/Sites/hb/wp-admin/plugin-install.php(67): do_action('install_plugins...')
#4 /Users/javorszky/.composer/vendor/laravel/valet/server.php(133): require('/Users/javorszk...')
#5 {main}
  thrown in /Users/javorszky/Sites/hb/wp-admin/includes/plugin-install.php on line 501