* [iOS] Adds configuration option to exclude downloaded files from iCloud backup
* Adds `allGroups` parameter to `allTasks` and `allTaskIds` methods, to retrieve all tasks regardless of `group`
* [Android] Fixes issue with un-commanded restart of a download in specific scenarios

Solves compilation issue when using Kotlin 2 compiler

Update GitHub build.yaml and CHANGELOG.md to reflect new minimum SDK (Dart 3.2 required, included in Flutter 3.16.0)

* Adds option to specify a file location for upload using a Mediastore URI on Android, using `UploadTask.fromUri`. A Mediastore URI can also be requested from methods `moveToSharedStorage` and `pathInSharedStorage` by adding `asAndroidUri = true` to the call.
* Fixes bug with ParallelDownload when an error occurs
* Updates dependency on package mime to 2.0. Use `dependency_overrides` in pubspec.yaml to resolve (background_downloader works with 1.0 and 2.0)

* Adds option for partial uploads, for binary uploads only. Set the byte range by adding a "Range" header to your binary `UploadTask`, e.g. a value of "bytes=100-149" will upload 50 bytes starting at byte 100. You can omit the range end (but not the "-") to upload from the indicated start byte to the end of the file.  The "Range" header will not be passed on to the server. Note that on iOS an invalid range will cause enqueue to fail, whereas on Android and Desktop the task will fail when attempting to start.
* Fixes issue in iOS when multiple Flutter engines register the plugin
* Fixes issue with lingering HTTP connections on desktop
* Adds CI workflow (formatting, lints, build Android, build iOS)

* Fixes desktop upload cancellation bug
* Adds Url-encoding of Content-Disposition header for binary uploads. Note for multipart uploads, filename is 'browserEncoded' which does not encode Non-ASCII characters
* Fixes bug with creation of unique filename on iOS

Serializes database updates for TaskRecords, preventing slower writes to finish after a subsequent faster write, which can lead to an incorrect database state.

* If the value of a `fields` entry of an `UploadTask` is in JSON format (defined as start/end with {} or []) then the field's mime-type will be set to `application/json`, whereas it would not have been set prior
* Fixes an issue on iOS where use of the holding queue can lead to deadlock
* For Windows, when using `BaseDirectory.root`, fixes an issue with `Task.split` and `Task.baseDirectoryPath`. When using `BaseDirectory.root` on Windows, your task's `directory` must contain the drive letter.

Removes references to `dart:html` to allow web compilation using WASM. Note the package still does not work on the web

Adds auto-decode of `post` field if Map or List. Throws if `jsonEncode` cannot convert the object, in which case you have to encode it yourself using a custom encoder

V8.5.1 Fixes an issue where temporary files were not deleted when canceling a paused parallel download task

#264 Adds `UploadTask.fromFile` to create an `UploadTask` from an existing `File` object. Note that this will create a task with an absolute path reference and `BaseDirectory.root`, which can cause problems on mobile platforms, so use with care

Conditionally adds the foreground service type to the ForegroundInfo object created in Notifications.kt method displayNotification.

To specify multiple values for a single name, format the value as '"value1", "value2", "value3"' (note the double quotes and the comma to separate the values).

V8.1.0 add `responseHeaders` to `TaskStatusUpdate` for tasks that complete successfully (null otherwise)

Also added `ext.kotlin_version` back to build.gradle

No commitment to support API 21-24 indefinitely, but for now this API range is supported

Add compiler version gate for Swift >=5.9

iOS: Changed GroupNotification from class to actor
Android: Changed notifications property to a ConcurrentHashMap

Adds `ready` to FileDownloader and includes `await ready` in `trackTasks` call to ensure database is ready before attempting to use it.

Non-null if provided by the server, and only for status.isFinalState

Example: DownloadTask(url: url, directory: '/testDir') used to throw, now stores 'testDir' in directory

The reason for this change is that the `sqflite` dependency adds significant size to apps, even if they do not use the SQLite functionality.

Add documentation
Bug fixes after testing

You can now pass an absolute path to the downloader by using `BaseDirectory.root` combined with the path in `directory`. This allows you to reach any file destination on your platform. However, be careful: the reason you should not normally do this (and use e.g. `BaseDirectory.applicationDocuments` instead) is that the location of the app's documents directory may change between application starts (on iOS, and on Android in some cases), and may therefore fail for downloads that complete while the app is suspended.  You should therefore never store permanently, or hard-code, an absolute path, unless you are absolutely sure that that path is 'stable'.

Fix merge issues
Fix bugs
Add README.md and CHANGELOG.md