Update various python build requirements. (#3641)

py-polars/build.requirements.txt

@@ -10,14 +10,14 @@ pytz
 types-pytz
 
 # Tooling
-maturin==0.12.1
-pytest==6.2.5
+maturin==0.12.19
+pytest==7.1.2
 pytest-cov[toml]==3.0.0
 black==21.6b0
 blackdoc==0.3.4
-isort~=5.9.2
-mypy==0.910
-ghp-import==2.0.1
+isort~=5.10.1
+mypy==0.961
+ghp-import==2.1.0
 flake8==4.0.1
 sphinx==4.2.0
 pydata-sphinx-theme==0.6.3
@@ -30,12 +30,13 @@ sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 sphinxcontrib-napoleon
 commonmark==0.9.1
-numpydoc==1.1.0
+numpydoc==1.3.1
 
 # Stub files
-pandas-stubs==1.2.0.39
+pandas-stubs==1.2.0.61
 
 
 # pinned third rate deps
 # to be removed later
-click==8.0.4
+click==8.0.4
+

py-polars/tests/test_df.py

@@ -15,6 +15,11 @@
 import polars as pl
 from polars import testing
 
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from typing_extensions import Literal  # pragma: no cover
+
 
 def test_version() -> None:
     pl.__version__
@@ -1821,9 +1826,9 @@ def test_shrink_to_fit(in_place: bool) -> None:
     df = pl.DataFrame({"foo": [1, 2, 3], "bar": [6, 7, 8], "ham": ["a", "b", "c"]})
 
     if in_place:
-        assert df.shrink_to_fit(in_place) is None
+        assert df.shrink_to_fit(typing.cast(Literal[True], in_place)) is None
     else:
-        assert df.shrink_to_fit(in_place).frame_equal(df)  # type: ignore
+        assert df.shrink_to_fit(typing.cast(Literal[False], in_place)).frame_equal(df)
 
 
 def test_arithmetic() -> None: