Make sure that the Python wheel package is installed on all CI jobs

Author: Takishima

.github/workflows/ci.yml

@@ -53,6 +53,7 @@ jobs:
     - name: Prepare env
       run: |
         python setup.py gen_reqfile --include-extras
+        python -m pip install wheel
         python -m pip install -r requirements.txt --prefer-binary
         python -m pip install -r requirements_tests.txt --prefer-binary
         python -m pip install coveralls
@@ -213,7 +214,7 @@ jobs:
         key: ${{ runner.os }}-centos${{ matrix.centos }}-yum-${{ secrets.yum_cache }}
 
     - name: Add Python 3 and other dependencies
-      run: yum update -y && yum install -y python3-devel gcc-c++ make
+      run: yum update -y && yum install -y python3-devel python3-wheel gcc-c++ make
 
     - name: Setup Endpoint repository (CentOS 7 only)
       if: matrix.centos == 7
@@ -245,6 +246,7 @@ jobs:
     - name: Install dependencies
       run: |
         python3 setup.py gen_reqfile --include-extras
+        python3 -m pip install wheel
         python3 -m pip install -r requirements.txt --prefer-binary
         python3 -m pip install -r requirements_tests.txt --prefer-binary
 
@@ -284,6 +286,7 @@ jobs:
     - name: Install docs & setup requirements
       run: |
         python3 setup.py gen_reqfile --include-extras
+        python3 -m pip install wheel
         python3 -m pip install -r requirements.txt --prefer-binary
         python3 -m pip install -r docs/requirements.txt --prefer-binary
         python3 -m pip install .
@@ -335,6 +338,7 @@ jobs:
     - name: Prepare env
       run: |
         python setup.py gen_reqfile --include-extras
+        python -m pip install wheel
         python -m pip install -r requirements.txt --prefer-binary
         python -m pip install -r requirements_tests.txt --prefer-binary