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/sebastian/diff/src/Diff.php

@@ -1,114 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of sebastian/diff.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace SebastianBergmann\Diff;
-
-use ArrayIterator;
-use IteratorAggregate;
-use Traversable;
-
-/**
- * @template-implements IteratorAggregate<int, Chunk>
- */
-final class Diff implements IteratorAggregate
-{
-    /**
-     * @psalm-var non-empty-string
-     */
-    private string $from;
-
-    /**
-     * @psalm-var non-empty-string
-     */
-    private string $to;
-
-    /**
-     * @psalm-var list<Chunk>
-     */
-    private array $chunks;
-
-    /**
-     * @psalm-param non-empty-string $from
-     * @psalm-param non-empty-string $to
-     * @psalm-param list<Chunk> $chunks
-     */
-    public function __construct(string $from, string $to, array $chunks = [])
-    {
-        $this->from   = $from;
-        $this->to     = $to;
-        $this->chunks = $chunks;
-    }
-
-    /**
-     * @psalm-return non-empty-string
-     */
-    public function from(): string
-    {
-        return $this->from;
-    }
-
-    /**
-     * @psalm-return non-empty-string
-     */
-    public function to(): string
-    {
-        return $this->to;
-    }
-
-    /**
-     * @psalm-return list<Chunk>
-     */
-    public function chunks(): array
-    {
-        return $this->chunks;
-    }
-
-    /**
-     * @psalm-param list<Chunk> $chunks
-     */
-    public function setChunks(array $chunks): void
-    {
-        $this->chunks = $chunks;
-    }
-
-    /**
-     * @psalm-return non-empty-string
-     *
-     * @deprecated
-     */
-    public function getFrom(): string
-    {
-        return $this->from;
-    }
-
-    /**
-     * @psalm-return non-empty-string
-     *
-     * @deprecated
-     */
-    public function getTo(): string
-    {
-        return $this->to;
-    }
-
-    /**
-     * @psalm-return list<Chunk>
-     *
-     * @deprecated
-     */
-    public function getChunks(): array
-    {
-        return $this->chunks;
-    }
-
-    public function getIterator(): Traversable
-    {
-        return new ArrayIterator($this->chunks);
-    }
-}