Add hatch for building

Author: jaydu1

causarray/__about__.py

@@ -0,0 +1 @@
+__version__ = "0.0.1"

causarray/__init__.py

@@ -9,9 +9,8 @@
 from causarray.utils import prep_causarray_data, reset_random_seeds, comp_size_factor
 
 from causarray.gcate import *
-from causarray._version import __version__
+from causarray.__about__ import __version__
 
-__version__ = '.'.join(__version__.split('.')[:3])
 __license__ = "MIT"
 
 __author__ = "Jin-Hong Du, Maya Shen, Hansruedi Mathys, and Kathryn Roeder"

causarray/_version.py

@@ -1,6 +1,6 @@
 [build-system]
-requires = ["setuptools>=45", "setuptools_scm[toml]>=6.2", "wheel"]
-build-backend = "setuptools.build_meta"
+requires = ["setuptools>=45", "setuptools_scm[toml]>=6.2", "wheel", "hatchling"]
+build-backend = "hatchling.build"
 
 [tool.hatch.build.targets.sdist]
 only-packages = true
@@ -54,7 +54,10 @@ classifiers = [
 
 ] 
 
-[tool.setuptools_scm]
-version_scheme = "no-guess-dev"
-local_scheme = "no-local-version"
-write_to = "causarray/_version.py"
+
+
+[tool.hatch.version]
+path = "causarray/__about__.py"
+
+[tool.hatch.version.raw-options]
+local_scheme = "no-local-version"