Remove 3.7 remnants in docs/metadata (#95)

Author: JelleZijlstra

README.rst

@@ -17,7 +17,7 @@ Projects for which ``typeshed_client`` could be useful include:
 Installation
 ------------
 
-``typeshed_client`` works on Python 3.7 and higher. To install it, run
+``typeshed_client`` works on all supported versions of Python. To install it, run
 ``python3 -m pip install typeshed_client``.
 
 Finding stubs

pyproject.toml

@@ -58,7 +58,6 @@ exclude = [
 ]
 
 [tool.ruff]
-
 line-length = 100
 target-version = "py38"
 preview = true

setup.py

@@ -55,13 +55,12 @@ def find_bundled_files() -> Iterable[str]:
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "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 :: 3.12",
         "Topic :: Software Development",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion=2.3.1
-envlist = py37,py38,py39,py310,py311,py312,black,mypy
+envlist = py38,py39,py310,py311,py312,black,mypy
 isolated_build = True
 
 [testenv]