Added some missing typehints

app/src/Config.php

@@ -16,7 +16,13 @@ class Config
         $this->container = $container;
     }
 
-    /** Get the value of a configuration variable. */
+    /**
+     * Get the value of a configuration variable.
+     *
+     * @param mixed $default
+     *
+     * @return mixed
+     */
     public function get(string $key, $default = null)
     {
         try {

app/src/Exceptions/InvalidConfiguration.php

@@ -6,7 +6,11 @@ use RuntimeException;
 
 final class InvalidConfiguration extends RuntimeException
 {
-    /** Create an exception from a configuration option and value. */
+    /**
+     * Create an exception from a configuration option and value.
+     *
+     * @param mixed $value
+     */
     public static function fromConfig(string $option, $value): self
     {
         return new static(

app/src/ViewFunctions/Config.php

@@ -18,7 +18,11 @@ class Config extends ViewFunction
         $this->config = $config;
     }
 
-    /** Retrieve an item from the view config. */
+    /**
+     * Retrieve an item from the view config.
+     *
+     * @param mixed $default
+     */
     public function __invoke(string $key, $default = null)
     {
         return $this->config->get($key, $default);