Add NumPY as required dependency

fixes #25

Removed the `requires-dist` since the better/improved way seems to be
with `[dependencies]`, see https://www.maturin.rs/metadata

pyproject.toml

@@ -5,10 +5,14 @@ build-backend = "maturin"
 [project]
 name = "startinpy"
 requires-python = ">=3.9"
-requires-dist = ["toml>=0.10.2"]
 classifiers = [
     "Programming Language :: Rust",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
 
+dependencies = [
+    "toml>=0.10.2", 
+    "numpy>=2.0.0"
+]
+