Fix install dev.

Author: ameya98

README.md

@@ -13,10 +13,17 @@ All modules are compatible with PyTorch 2.0's `torch.compile` for JIT compilatio
 
 ## Installation
 
+Install from PyPI:
+
 ```bash
 pip install e3tools
 ```
 
+or get the latest development version from GitHub:
+```bash
+pip install git+https://github.com/prescient-design/e3tools.git
+```
+
 ## Examples
 
 See [examples/e3conv.py](https://github.com/prescient-design/e3tools/blob/main/examples/e3conv.py) for an example

pyproject.toml

@@ -19,7 +19,7 @@ dependencies = [
 requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
-[dependency-groups]
+[project.optional-dependencies]
 dev = [
     "hatch>=1.14.0",
     "ipython>=8.34.0",