[Add] travis-ci: update setuptools before pip install

.travis.yml

@@ -27,6 +27,7 @@ matrix:
       before_install:
         - choco install python3 --version 3.7.2
       install:
+        - python -m pip install --upgrade pip wheel setuptools
         - pip install -r requirements.txt
         - pip install .
 
@@ -42,6 +43,7 @@ matrix:
         - sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-8 90
         - sudo update-alternatives --install /usr/bin/gcc cc /usr/bin/gcc-8 90
         # Linux install script
+        - python -m pip install --upgrade pip wheel setuptools
         - bash ./install.sh
 
     - name: "pip install under Ubuntu: gcc-7"