abandon python 3.9

Author: emanuel-schmid

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       # Do not abort other tests if only a single one fails
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
 
     steps:
       -

doc/guide/install.rst

@@ -179,7 +179,7 @@ For advanced Python users or developers of CLIMADA, we recommed cloning the CLIM
          * - **Supported Version**
            - ``3.11``
          * - Allowed Versions
-           - ``3.9``, ``3.10``, ``3.11``
+           - ``3.10``, ``3.11``
 
 #. Use the default environment specs in ``env_climada.yml`` to install all dependencies.
    Then activate the environment:

setup.py

@@ -58,7 +58,7 @@
         "Topic :: Scientific/Engineering :: Mathematics",
     ],
     keywords="climate adaptation",
-    python_requires=">=3.9,<3.12",
+    python_requires=">=3.10,<3.12",
     install_requires=[
         "bayesian-optimization<2.0",
         "bottleneck",