Drop support for Python 3.9

[Copilot]

The dev version of nwbinspector now requires Python 3.10+, breaking our dev-deps CI job on Python 3.9.

Changes

pyproject.toml

• Bump requires-python from >=3.9 to >=3.10
• Remove Programming Language :: Python :: 3.9 classifier
• Remove eval_type_backport dependency (only needed for Python <3.10)

GitHub Actions workflows

• run-tests.yml: Remove 3.9 from test matrix; update dandi-api, dev-deps, nfs modes to 3.10
• lint.yml, typing.yml, release.yml: Update Python version to 3.10
• docs.yml: Remove 3.9-specific hdf5 install step

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Drop support of Python 3.9</issue_title>
<issue_description>The dev version of nwbinspector has started requiring Python 3.10 or above, as can be seen in its pyproject.toml file and out failing test:

Let's drop our support for Python 3.10 to be in step with dependencies such as nwbinspector.

Possible steps involved.

1. Update the Python requirement in pyproject.toml
2. Remove used of Python 3.9 in test environments.</issue_description>

Comments on the Issue (you are @copilot in this section)

@candleindark Ping @yarikoptic @yarikoptic ok, let's drop altogether because dependency will be released soon with dropped support .... my initial diff was

diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index aa01427d..dbebec3f 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -28,10 +28,6 @@ jobs:
       with:
         python-version: ${{ matrix.python }}
 
-    - name: Install hdf5 (Ubuntu)
-      if: matrix.python == '3.9' && startsWith(matrix.os, 'ubuntu')
-      run: sudo apt-get update && sudo apt-get install -y libhdf5-dev
-
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip wheel
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 23486afb..cd620424 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.9'
+        python-version: '3.10'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index bcf7673e..8d6f56cc 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -50,7 +50,7 @@ jobs:
             python: 3.13
             mode: obolibrary-only
           - os: ubuntu-latest
-            python: 3.9
+            python: 3.10
             mode: dev-deps
           - os: ubuntu-latest
             python: 3.13

```</body></comment_new>
</comments>

• Fixes Drop support of Python 3.9 #1758

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.03%. Comparing base (c43062d) to head (9706277).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1759      +/-   ##
==========================================
- Coverage   75.06%   75.03%   -0.03%     
==========================================
  Files          84       84              
  Lines       11873    11873              
==========================================
- Hits         8912     8909       -3     
- Misses       2961     2964       +3     

Flag	Coverage Δ
unittests	75.03% <ø> (-0.03%)	⬇️

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