build: add Python 3.14 support

Author: portyanikhin

pyproject.toml

@@ -3,7 +3,7 @@ name = "pyfluids"
 version = "2.8.2"
 description = "Simple, full-featured, lightweight CoolProp wrapper for Python"
 readme = "PyPI.md"
-requires-python = ">=3.9, <3.14"
+requires-python = ">=3.9, <3.15"
 license = "MIT"
 authors = [{ name = "Vladimir Portyanikhin", email = "v.portyanikhin@ya.ru" }]
 keywords = [
@@ -36,6 +36,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: Implementation",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Education",