Remove requirements files and add dependencies into pyproject.toml instead

Author: timsaucer

pyproject.toml

@@ -24,7 +24,7 @@ name = "datafusion"
 description = "Build and run queries against data"
 readme = "README.md"
 license = { file = "LICENSE.txt" }
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 keywords = ["datafusion", "dataframe", "rust", "query-engine"]
 classifiers = [
     "Development Status :: 2 - Pre-Alpha",
@@ -35,7 +35,6 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
@@ -82,3 +81,11 @@ max-doc-length = 88
 "dev/*" = ["D"]
 "benchmarks/*" = ["D", "F"]
 "docs/*" = ["D"]
+
+[dependency-groups]
+dev = [
+    "numpy>1.24.4 ; python_full_version >= '3.10'",
+    "pytest>=7.4.4",
+    "ruff>=0.9.1",
+    "toml>=0.10.2",
+]