chore: re-add rdkit as optional dependency

Author: timurbazhirov

pyproject.toml

@@ -3,7 +3,7 @@ name = "express-py"
 dynamic = ["version"]
 description = "EXcellent PRoperty Extractor and Serializer."
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 license = { file = "LICENSE.md" }
 authors = [
     { name = "Exabyte Inc.", email = "info@mat3ra.com" }
@@ -19,18 +19,19 @@ dependencies = [
     "pymatgen>=2023.8.10",
     "ase>=3.17.0",
     "mat3ra-esse>=2024.1.25.post7",
-    # Temporarily disable rdkit to allow running in Jupyter Lite
-    # "rdkit-pypi>=2022.3.5",
     "jarvis-tools>=2023.12.12",
     # To avoid module 'numpy.linalg._umath_linalg' has no attribute '_ilp64' in Colab
     "numpy>=1.24.4,<2",
 ]
 
 [project.optional-dependencies]
+extra = [
+    "rdkit-pypi>=2022.3.5",
+]
 tests = [
     "coverage[toml]>=5.3",
 ]
-all = ["express-py[tests]"]
+all = ["express-py[tests]", "express-py[extra]"]
 
 [tool.coverage.run]
 source = ['.']