Fix missing intl extension in workflow

.gitattributes

@@ -4,3 +4,4 @@
 /.phive                 export-ignore
 /psalm.baseline.xml     export-ignore
 /psalm.xml              export-ignore
+/stubs                  export-ignore

.github/workflows/tests.yml

@@ -14,3 +14,4 @@ jobs:
         uses: docker://vimeo/psalm-github-actions
         with:
           args: --shepherd
+          composer_ignore_platform_reqs: true

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "cracksalad/i18n",
-    "version": "0.1.1",
+    "version": "0.1.2",
     "type": "library",
     "description": "PHP library to properly handle internationalization, but in a stateless fashion - no gettext()!",
     "keywords": [

psalm.xml

@@ -11,4 +11,8 @@
     <projectFiles>
         <directory name="src" />
     </projectFiles>
+
+    <stubs>
+        <file name="stubs/intl.php"></file>
+    </stubs>
 </psalm>

stubs/intl.php

@@ -0,0 +1,15 @@
+<?php
+class MessageFormatter {
+
+  public function __construct(string $locale, string $pattern){}
+  public static function create(string $locale, string $pattern): ?MessageFormatter {}
+  public static function formatMessage(string $locale, string $pattern, array $values): string|false {}
+  public function format(array $values): string|false {}
+  public function getErrorCode(): int {}
+  public function getErrorMessage(): string {}
+  public function getLocale(): string {}
+  public function getPattern(): string|false {}
+  public static function parseMessage(string $locale, string $pattern, string $message): array|false {}
+  public function parse(string $string): array|false {}
+  public function setPattern(string $pattern): bool {}
+}