4.5.4

Commits

• No longer use removed 'filter' option in setting fields. (d348204)
• Removed unused use Pronamic\WordPress\Pay\Core\Server;. (1450321)
• No longer use Server::get method, will be removed. (28f76ed)
• It is recommended not to use reserved keyword "list". (451066d)
• No longer use HTML
  element in exception message and escape values. (2fc139e)
• Fixed "All output should be run through an escaping function". (33f0b20)
• Removed old see ref in docblock. (c0592bb)
• Added iDEAL issuer Nationale Nederlanden. (bb4cf32)