Remove redundant cast and drop Python 3.9 support (#144)

* Remove redundant cast
* Drop Python 3.9 support, as it's EOL. Ref: https://devguide.python.org/versions/#supported-versions

Author: stefanvanburen

.github/workflows/ci.yaml

@@ -25,8 +25,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: "3.9"
-            tox-target: py39
           - python-version: "3.10"
             tox-target: py310
           - python-version: "3.11"

pyproject.toml

@@ -26,7 +26,7 @@ classifiers = [
 authors = [
     { name = "S.Lott", email = "[email protected]" }
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 
 dependencies = [
     # 3.13 needs at least this version, which started publishing wheels for Python 3.13.
@@ -78,7 +78,7 @@ dev = [
 ]
 
 [tool.tox]
-envlist = ["py39", "py310", "py311", "py312", "py313", "lint", "tools"]
+envlist = ["py310", "py311", "py312", "py313", "lint", "tools"]
 minversion = "4.24.0"
 
 [tool.tox.env_run_base]

src/celpy/celtypes.py

@@ -441,7 +441,7 @@ def __new__(
                 cast(bytes, source.get(StringType("value"))),
             )
         elif isinstance(source, Iterable):
-            return super().__new__(cls, cast(Iterable[int], source))
+            return super().__new__(cls, source)
         else:
             raise TypeError(f"Invalid initial value type: {type(source)}")