Bug: Capability to read METADATA from non pypi sources

[PhorstenkampFuzzy]

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Issue Details

No license/authro/homepage detection from non pypi packages such as:

https://spacy.io/models/de#de_core_news_sm

Here a section from the METADATA file

Metadata-Version: 2.1
Name: de_core_news_sm
Version: 3.8.0
Summary: German pipeline optimized for CPU. Components: tok2vec, tagger, morphologizer, parser, lemmatizer (trainable_lemmatizer), senter, ner.
Home-page: https://explosion.ai
Author: Explosion
Author-email: contact@explosion.ai
License: MIT
License-File: LICENSE
License-File: LICENSES_SOURCES