Use dev-main for pronamic-pay-forms

Update composer.json to require pronamic/wp-pronamic-pay-forms at dev-main (was ^1.2) to track the main branch. Regenerated composer.lock to reflect the dependency update and new package metadata.

Author: remcotolsma

composer.json

@@ -101,7 +101,7 @@
 		"pronamic/wp-number": "^1.4",
 		"pronamic/wp-pay-logos": "^2.3",
 		"pronamic/wp-pronamic-forms": "^2.0",
-		"pronamic/wp-pronamic-pay-forms": "^1.2",
+		"pronamic/wp-pronamic-pay-forms": "dev-main",
 		"woocommerce/action-scheduler": "^3.9",
 		"wp-pay-extensions/charitable": "^4.3",
 		"wp-pay-extensions/contact-form-7": "^4.2",