Bump stripe/stripe-php from 19.3.0 to 19.4.0

Bumps [stripe/stripe-php](https://github.com/stripe/stripe-php) from 19.3.0 to 19.4.0.
- [Release notes](https://github.com/stripe/stripe-php/releases)
- [Changelog](https://github.com/stripe/stripe-php/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stripe/stripe-php/compare/v19.3.0...v19.4.0)

---
updated-dependencies:
- dependency-name: stripe/stripe-php
  dependency-version: 19.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.lock

@@ -1815,16 +1815,16 @@
         },
         {
             "name": "stripe/stripe-php",
-            "version": "v19.3.0",
+            "version": "v19.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/stripe/stripe-php.git",
-                "reference": "462272ae7560ee29bb891763fd0967d5a77784e5"
+                "reference": "a8c9db819f86ec47e603b92f9be99661e6a62cf4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/stripe/stripe-php/zipball/462272ae7560ee29bb891763fd0967d5a77784e5",
-                "reference": "462272ae7560ee29bb891763fd0967d5a77784e5",
+                "url": "https://api.github.com/repos/stripe/stripe-php/zipball/a8c9db819f86ec47e603b92f9be99661e6a62cf4",
+                "reference": "a8c9db819f86ec47e603b92f9be99661e6a62cf4",
                 "shasum": ""
             },
             "require": {
@@ -1868,9 +1868,9 @@
             ],
             "support": {
                 "issues": "https://github.com/stripe/stripe-php/issues",
-                "source": "https://github.com/stripe/stripe-php/tree/v19.3.0"
+                "source": "https://github.com/stripe/stripe-php/tree/v19.4.0"
             },
-            "time": "2026-01-28T21:15:45+00:00"
+            "time": "2026-02-25T17:46:20+00:00"
         },
         {
             "name": "symfony/deprecation-contracts",