Add API base URL castomization option

phpunit.xml.dist

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.1/phpunit.xsd" bootstrap="vendor/autoload.php" executionOrder="depends,defects" beStrictAboutOutputDuringTests="true" failOnRisky="true" failOnWarning="true" colors="true" cacheDirectory=".phpunit.cache" requireCoverageMetadata="true" beStrictAboutCoverageMetadata="true">
+  <testsuites>
+    <testsuite name="Gos Test Suite">
+      <directory suffix=".php">tests</directory>
+    </testsuite>
+  </testsuites>
+  <source>
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </source>
+</phpunit>