Prepare for python 3.13

I've found references to `__file__` in your package: https://github.com/tonsky/Clojure-Sublimed/blob/edadce32e9b4909dccd91296109970d3be8d6e31/cs_common.py#L283 As modern python 3.1x releases move on towards `__spec__` and drop support for `__file__` and `__package__` globals, it is recommended to replace relevant references to ensure compatibility with upcoming ST dev builds. If this package targets ST4 and python 3.8+ it is an easy change by just replacing: - `__file__` => `__spec__.origin` - `__package__` => `__spec__.parent` Python 3.3 doesn't support `__spec__` and would require a fallback. A common pattern might be ```py try: package_path = os.path.dirname(__spec__.origin) except (AttributeError, NameError): package_path = os.path.dirname(__file__) ```