put setuptools_scm back in setup.py

Author: rmorshea

pyproject.toml

@@ -1,5 +1,3 @@
 [build-system]
-requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+requires = ["setuptools>=42", "wheel"]
 build-backend = "setuptools.build_meta"
-
-[tool.setuptools_scm]

setup.py

@@ -33,6 +33,8 @@
     "keywords": ["interactive", "widgets", "DOM", "React"],
     "include_package_data": True,
     "zip_safe": False,
+    "setup_requires": ["setuptools_scm"],
+    "use_scm_version": True,
     "classifiers": [
         "Intended Audience :: Developers",
         "Intended Audience :: Science/Research",