[ci] reinstall numpy to solve "E ValueError: numpy.dtype size changed…

…, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject"

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: python -m pip install cython numpy scipy matplotlib corner getdist h5py pandas flake8 pycodestyle pydocstyle pytest-html pytest-xdist
+      run: python -m pip install --upgrade --force-reinstall cython numpy scipy matplotlib corner getdist h5py pandas flake8 pycodestyle pydocstyle pytest-html pytest-xdist
 
     - name: Lint with flake8
       run: flake8 $(ls ultranest/*.py | grep -Ev '^ultranest/(flatnuts|dychmc|dyhmc|pathsampler).py')