Unpin kerchunk (set floor) and enable Python 3.12 (#108)

* Unpin kerchunk (use main) and enable Pyhton 3.12

* Set floor for kerchunk

Author: jsignell

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
         shell: bash -l {0}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
 

pyproject.toml

@@ -17,12 +17,13 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 requires-python = ">=3.9"
 dynamic = ["version"]
 dependencies = [
     "xarray@git+https://github.com/pydata/xarray.git@main#egg=xarray",
-    "kerchunk==0.2.2",
+    "kerchunk>=0.2.5",
     "h5netcdf",
     "pydantic",
     "numpy",