Fix typing-extensions dependency, fix mypy (#437)

Author: tony

CHANGES

@@ -22,6 +22,11 @@ $ pip install --user --upgrade --pre libvcs
   - Raises error if no items found (unless `default=` keyword argument passed)
   - Raises error if multipe items found
 
+### Bug fixes
+
+- Remove required dependency of typing-extensions (#437)
+- Ignore a single line of mypy check in dataclasses for now (#437)
+
 ## libvcs 0.20.0 (2022-10-31)
 
 ### What's new

src/libvcs/_internal/dataclasses.py

@@ -76,7 +76,7 @@ def __repr__(self) -> str:
         """Omit default fields in object representation."""
         nodef_f_vals = (
             (f.name, attrgetter(f.name)(self))
-            for f in dataclasses.fields(self)
+            for f in dataclasses.fields(self)  # type:ignore
             if attrgetter(f.name)(self) != f.default
         )
 

src/libvcs/_internal/run.py

@@ -14,8 +14,6 @@
 from collections.abc import Iterable, Mapping, MutableMapping, Sequence
 from typing import IO, TYPE_CHECKING, Any, AnyStr, Callable, Optional, Protocol, Union
 
-from typing_extensions import TypeAlias
-
 from libvcs._internal.types import StrOrBytesPath
 
 from .. import exc
@@ -37,6 +35,7 @@ def console_to_str(s: bytes) -> str:
 
 if TYPE_CHECKING:
     _LoggerAdapter = logging.LoggerAdapter[logging.Logger]
+    from typing_extensions import TypeAlias
 else:
     _LoggerAdapter = logging.LoggerAdapter
 
@@ -87,14 +86,14 @@ def __call__(self, output: AnyStr, timestamp: datetime.datetime) -> None:
 
 
 if sys.platform == "win32":
-    _ENV: TypeAlias = Mapping[str, str]
+    _ENV: "TypeAlias" = Mapping[str, str]
 else:
-    _ENV: TypeAlias = Union[
+    _ENV: "TypeAlias" = Union[
         Mapping[bytes, StrOrBytesPath], Mapping[str, StrOrBytesPath]
     ]
 
 _CMD = Union[StrOrBytesPath, Sequence[StrOrBytesPath]]
-_FILE: TypeAlias = Optional[Union[int, IO[Any]]]
+_FILE: "TypeAlias" = Optional[Union[int, IO[Any]]]
 
 
 def run(