Make all type annotations lazy #386
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PEP 563 introduced postponed evaluation of type annotations. It makes importing modules faster and allows to use the latest Python features in older Python releases and to use forward references and type-checking-only objects without quoting annotations. In other words, a lot of cool stuff. The feature can be activated since Python 3.7 by adding in the file
from __future__ import annotations. The feature was supposed to be the default behavior since Python 3.10 or so, but was postponed indefinitely because of some corner cases when it doesn't work well (runtime type annotation evaluation for closures).