added other missing prerequesites

- made it explicit that dependencies are not installed, if they
    are already present

Author: mcocdawc

README.md

@@ -8,8 +8,11 @@ A library of density matrix embedding theory (DMET) for lattice models and reali
 Installation
 ------------
 
-* Prerequisites (will be automatically installed.)
+* Prerequisites (will be automatically installed if not yet present.)
     - [PySCF](https://github.com/pyscf/pyscf) 2.0 or higher.
+    - [numpy](https://numpy.org/doc/stable/index.html)
+    - [scipy](https://scipy.org/)
+    - [h5py](https://www.h5py.org/)
 
 
 * Just call

pyproject.toml

@@ -9,7 +9,7 @@ packages = ["libdmet", "libdmet_solid"]
 [project]
 name = "libdmet"
 version = "0.5"
-dependencies = ["pyscf", "numpy", "scipy", "h5py"]
+dependencies = ["pyscf>=2.0", "numpy", "scipy", "h5py"]
 requires-python = ">= 3.1"
 authors = [
   {name = "Zhihao Cui", email = "zhcui0408@gmail.com"},