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/league/flysystem/src/FilesystemWriter.php

@@ -1,58 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace League\Flysystem;
-
-interface FilesystemWriter
-{
-    /**
-     * @throws UnableToWriteFile
-     * @throws FilesystemException
-     */
-    public function write(string $location, string $contents, array $config = []): void;
-
-    /**
-     * @param mixed $contents
-     *
-     * @throws UnableToWriteFile
-     * @throws FilesystemException
-     */
-    public function writeStream(string $location, $contents, array $config = []): void;
-
-    /**
-     * @throws UnableToSetVisibility
-     * @throws FilesystemException
-     */
-    public function setVisibility(string $path, string $visibility): void;
-
-    /**
-     * @throws UnableToDeleteFile
-     * @throws FilesystemException
-     */
-    public function delete(string $location): void;
-
-    /**
-     * @throws UnableToDeleteDirectory
-     * @throws FilesystemException
-     */
-    public function deleteDirectory(string $location): void;
-
-    /**
-     * @throws UnableToCreateDirectory
-     * @throws FilesystemException
-     */
-    public function createDirectory(string $location, array $config = []): void;
-
-    /**
-     * @throws UnableToMoveFile
-     * @throws FilesystemException
-     */
-    public function move(string $source, string $destination, array $config = []): void;
-
-    /**
-     * @throws UnableToCopyFile
-     * @throws FilesystemException
-     */
-    public function copy(string $source, string $destination, array $config = []): void;
-}