Eget-py

* Better interaction between `--to` and `--upgrade-only`.
* Support for `.tbz` and `.txz` extensions.
* Now uses environment PROXY settings for downloading.
* Support for symbolic links in extracted directories.
* New `--remove` flag for uninstalling binaries from `EGET_BIN`.
* New `^` syntax for anti-matches in `--asset`.
* System detector is now applied to `--asset` if applicable.

Changes:

* A direct URL to download from can be provided.
* The `--upgrade-only` option will use the Github release `created_at` date and local file modification date to avoid downloading a new binary if the local file is more recent than the latest release.

Bug fixes and improved pre-built binaries.

Adds support for extracting multiple files and directories. The `--file` option now accepts a glob which may match multiple files. The syntax is standard glob syntax, `*` for wildcard and `**` for super-wildcard (includes path separators).

If the `--all` option is provided or `all` is selected at the prompt, Eget extracts all candidate files. If a file marked for extraction is a directory, then all files within it are extracted to the destination.

This makes it possible to use Eget to install software that is distributed using more than just a single binary. For example, Go can be downloaded and extracted with `eget https://go.dev/dl/go1.17.5.linux-amd64.tar.gz --file go`.

* New `--rate` flag which will display your current rate limit status with GitHub API.
* Set `GITHUB_TOKEN` env variable to your GitHub OAuth token for authenticated requests with GitHub (increases allowed rate from 60 requests per hour to 5000 requests per hour).
* Can specify a local file instead of a repo/url and Eget will extract it.

* Support for xz compression.
* The `--file` option now also supports using paths rather than just base filenames.
* The `--asset` option can be abbreviated `-a`.
* The `--asset` option can be specified multiple times to repeatedly apply asset filters.