Update the pyproject and remove WIP caching feature

pyproject.toml

@@ -36,12 +36,15 @@ keywords = [
     "mygene"
 ]
 classifiers = [
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
     "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 :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Development Status :: 4 - Beta",
     "License :: OSI Approved :: BSD License",
     "Operating System :: POSIX",
@@ -54,23 +57,18 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Bio-Informatics",
 ]
 dependencies = [
-    "httpx>=0.27.2; python_version>='3.8'",
-    "httpx==0.24.1; python_version=='3.7'",
-    "requests==2.32.3; python_version>='3.8'",
-    "requests==2.31.0; python_version=='3.7'",
+    "httpx>0.24.1; python_version>='3.8'",
+    "httpx<=0.24.1; python_version=='3.7'",
+    "requests>=2.32.0; python_version>='3.8'",
+    "requests<=2.31.0; python_version=='3.7'",
     "importlib-metadata; python_version<'3.8'",
 ]
 version = "0.3.1"
 
 [project.optional-dependencies]
-dataframe = [
-    "pandas>=2.2.3; python_version>='3.9'",
-    "pandas>=1.5.0; python_version>='3.8'",
-    "pandas>=1.3.0; python_version>='3.7'",
-]
+dataframe = ["pandas>=1.3.0"]
 jsonld = ["PyLD>=0.7.2"]
 caching = [
-    # "hishel>=0.0.31",
     "requests_cache>=0.4.13"
 ]
 tests = [
@@ -81,7 +79,6 @@ tests = [
 ]
 
 
-
 [project.urls]
 homepage = "https://github.com/biothings/biothings_client.py"
 repository = "https://github.com/biothings/biothings_client.py"