Update deps/requirements

Author: mark9064

README.md

@@ -12,7 +12,7 @@ With async support
 
 Async support is available as soon as the required dependency (anyio) is installed, so `pip install factorio-rcon-py anyio` is mostly equivalent, but not recommended due to dependency versioning.
 
-Python 3.7+ is required.
+Python 3.8+ is required.
 
 ## Usage
 

pyproject.toml

@@ -8,7 +8,7 @@ version = "2.0.1"
 description = "A simple Factorio RCON client"
 dependencies = []
 readme = "README.md"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 license = {file = "LICENSE"}
 authors = [
     {name = "mark9064"}
@@ -17,13 +17,13 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: GNU Lesser General Public License v2 (LGPLv2)",
     "Operating System :: OS Independent",
-    "Development Status :: 4 - Beta",
+    "Development Status :: 5 - Production/Stable",
     "Natural Language :: English"
 ]
 
 [project.optional-dependencies]
 async = [
-    "anyio>=3.0, <4.0"
+    "anyio>=4.0, <5.0"
 ]
 
 [project.urls]