fix: Update well known config value function response types (#376)

* Fix: Update well known config value function response types

* Update CHANGELOG

* Update wellknown typing array to be string[]

* Update wellknown typing null can be default but would never be returned

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Update construct typehint in docblock. #364
 * Fixed LogoutToken verification for single value aud claims #334
 * Added function to set useragent #370
+* Update well known config value function response types #376
 
 ### Added
 - Support for signed and encrypted UserInfo response. #305

src/OpenIDConnectClient.php

@@ -587,13 +587,13 @@ protected function addAdditionalJwk($jwk) {
      * Gets anything that we need configuration wise including endpoints, and other values
      *
      * @param string $param
-     * @param string|array|null $default optional
-     * @return string|array
+     * @param string|string[]|bool|null $default optional
+     * @return string|string[]|bool
      *
-     *@throws OpenIDConnectClientException
+     * @throws OpenIDConnectClientException
      */
-    protected function getProviderConfigValue(string $param, $default = null) {
-
+    protected function getProviderConfigValue(string $param, $default = null)
+    {
         // If the configuration value is not available, attempt to fetch it from a well known config endpoint
         // This is also known as auto "discovery"
         if (!isset($this->providerConfig[$param])) {
@@ -607,12 +607,12 @@ protected function getProviderConfigValue(string $param, $default = null) {
      * Gets anything that we need configuration wise including endpoints, and other values
      *
      * @param string $param
-     * @param string|null $default optional
-     * @return string
+     * @param string|string[]|bool|null $default optional
+     * @return string|string[]|bool
      *
-     *@throws OpenIDConnectClientException
+     * @throws OpenIDConnectClientException
      */
-    protected function getWellKnownConfigValue(string $param, string $default = null): string
+    protected function getWellKnownConfigValue(string $param, $default = null)
     {
 
         // If the configuration value is not available, attempt to fetch it from a well known config endpoint