Update changelog and requirements for Cython 3.0 support

CHANGELOG.md

@@ -7,6 +7,11 @@ Supported versions of Python have been updated (drop support for Python 3.8, add
 * PlotPy < 2.7.0: Python 3.8, 3.9, 3.10, 3.11 and 3.12
 * PlotPy >= 2.7.0: Python 3.9, 3.10, 3.11, 3.12 and 3.13
 
+Other dependencies have been updated:
+
+* Updated versions to those available at the time of the release of the oldest supported Python version (3.9)
+* Exception: Cython 3.0 is required for Python 3.13
+
 💥 New features / Enhancements:
 
 * Added `AnnotatedPolygon` annotation to items

requirements.txt

@@ -1,5 +1,5 @@
 Coverage
-Cython
+Cython>=3.0
 NumPy>=1.17
 scikit-image>=0.18
 Pillow

setup.py

@@ -6,7 +6,6 @@
 import sys
 
 import numpy
-from Cython import __version__ as __cython_version__
 from Cython.Compiler import Main
 from setuptools import Distribution, Extension, setup
 
@@ -39,16 +38,6 @@ def compile_cython_extensions():
 
 MACROS_CYTHON = [("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")]
 CFLAGS_CYTHON = []
-# -------------------------------------------------------------------------------------
-# TODO: When dropping support for Cython < 3.0, we can remove the following lines.
-# In the meantime, we hide the deprecation warnings when building the package.
-if tuple(map(int, __cython_version__.split(".")[:2])) < (3, 0):
-    # hide deprecation warnings
-    MACROS_CYTHON = []
-    if not is_msvc():
-        CFLAGS_CYTHON = ["-Wno-cpp"]
-# -------------------------------------------------------------------------------------
-
 MACROS_CPP = [("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")]
 CFLAGS_CPP = ["/EHsc", "/fp:fast"] if is_msvc() else ["-Wall"]
 if platform.system() == "Darwin":