switch to PEP735 syntax

Author: itcarroll

.binder/environment.yml

@@ -2,10 +2,8 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  # This environment bootstraps pip, the actual dev environment
-  # is installed and managed with pip
   - python==3.11
-  - pip
+  - pip>=25.1
 variables:
   # Allow pip installs when conda environment is active
   PIP_REQUIRE_VENV: 0

.binder/postBuild

@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 set -eux
-python -m pip install --editable ".[dev,test,docs]"
+pip install --group dev --group test --group docs --editable .