fix: fix python 3.7 version for pyrfc 2.8.31

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["Cython ~= 0.29.0", "setuptools ~= 67.7.0", "wheel ~= 0.40.0"]
+requires = ["Cython ~= 0.29.0", "setuptools ~= 67.7.0", "wheel ~= 0.40.0", "importlib-metadata"]
 build-backend = "setuptools.build_meta"
 
 # https://packaging.python.org/en/latest/specifications/declaring-project-metadata/
@@ -11,7 +11,7 @@ license = { file = "LICENSES/Apache-2.0.txt" }
 description = "Python bindings for SAP NetWeaver RFC SDK"
 authors = [ { name = "SAP SE"} ]
 maintainers = [ { name = "Srdjan Boskovic", email = "[email protected]" } ]
-requires-python = ">=3.7"
+requires-python = ">=3.7,<3.8"
 keywords = ["pyrfc", "sap", "nwrfc", "sapnwrfc", "abap"]
 classifiers = [
     "Topic :: Software Development :: Build Tools",
@@ -24,10 +24,6 @@ classifiers = [
     "Programming Language :: Cython",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3 :: Only"
 ]
 dependencies = [

src/pyrfc/__init__.py

@@ -5,10 +5,7 @@
 import os
 import sys
 
-if sys.version_info < (3,8):
-    import importlib_metadata as mtd
-else:
-    import importlib.metadata as mtd
+import importlib_metadata as mtd
 
 __version__ = mtd.version("pyrfc")
 __version_info__ = tuple(__version__.split("."))