Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/laravel/serializable-closure/src/Serializers/Signed.php

@@ -1,91 +0,0 @@
-<?php
-
-namespace Laravel\SerializableClosure\Serializers;
-
-use Laravel\SerializableClosure\Contracts\Serializable;
-use Laravel\SerializableClosure\Exceptions\InvalidSignatureException;
-use Laravel\SerializableClosure\Exceptions\MissingSecretKeyException;
-
-class Signed implements Serializable
-{
-    /**
-     * The signer that will sign and verify the closure's signature.
-     *
-     * @var \Laravel\SerializableClosure\Contracts\Signer|null
-     */
-    public static $signer;
-
-    /**
-     * The closure to be serialized/unserialized.
-     *
-     * @var \Closure
-     */
-    protected $closure;
-
-    /**
-     * Creates a new serializable closure instance.
-     *
-     * @param  \Closure  $closure
-     * @return void
-     */
-    public function __construct($closure)
-    {
-        $this->closure = $closure;
-    }
-
-    /**
-     * Resolve the closure with the given arguments.
-     *
-     * @return mixed
-     */
-    public function __invoke()
-    {
-        return call_user_func_array($this->closure, func_get_args());
-    }
-
-    /**
-     * Gets the closure.
-     *
-     * @return \Closure
-     */
-    public function getClosure()
-    {
-        return $this->closure;
-    }
-
-    /**
-     * Get the serializable representation of the closure.
-     *
-     * @return array
-     */
-    public function __serialize()
-    {
-        if (! static::$signer) {
-            throw new MissingSecretKeyException();
-        }
-
-        return static::$signer->sign(
-            serialize(new Native($this->closure))
-        );
-    }
-
-    /**
-     * Restore the closure after serialization.
-     *
-     * @param  array  $signature
-     * @return void
-     *
-     * @throws \Laravel\SerializableClosure\Exceptions\InvalidSignatureException
-     */
-    public function __unserialize($signature)
-    {
-        if (static::$signer && ! static::$signer->verify($signature)) {
-            throw new InvalidSignatureException();
-        }
-
-        /** @var \Laravel\SerializableClosure\Contracts\Serializable $serializable */
-        $serializable = unserialize($signature['serializable']);
-
-        $this->closure = $serializable->getClosure();
-    }
-}