numpy<1.20 for CI builds to avoid incompatibility

.appveyor.yml

@@ -25,7 +25,7 @@ install:
   - set PATH=%MINICONDA%;%MINICONDA%\\Scripts;%PATH%
   - conda config --set always_yes yes --set changeps1 no
   - conda info -a
-  - conda create -q -n test-environment python=%PYTHON_VERSION% numpy scipy Cython
+  - conda create -q -n test-environment python=%PYTHON_VERSION% numpy<1.20 scipy Cython
   - activate test-environment
   - python -m pip install --upgrade pip
   - pip install wheel twine pytest

.circleci/config.yml

@@ -18,7 +18,7 @@ jobs:
           no_output_timeout: 30m
           command: |
             sudo pip install --upgrade pip
-            sudo pip install --only-binary=numpy,scipy numpy scipy Cython pytest pytest-cov codecov
+            sudo pip install --only-binary=numpy,scipy numpy<1.20 scipy Cython pytest pytest-cov codecov
             sudo pip install -e .[tests]
       - save_cache:
           key: deps9-{{ .Branch }}

.github/workflows/python-package.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install --only-binary=numpy,scipy numpy scipy Cython pytest pytest-cov codecov flake8
+        python -m pip install --only-binary=numpy,scipy numpy<1.20 scipy Cython pytest pytest-cov codecov flake8
         python -m pip install -e .[tests]
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8

.github/workflows/python-publish.yml

@@ -80,7 +80,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install --only-binary=numpy,scipy numpy scipy Cython wheel
+        python -m pip install --only-binary=numpy,scipy numpy<1.20 scipy Cython wheel
 
     - name: Build source tar file
       run: python setup.py sdist