Add missing github workflow dep.

Author: kpeeters

.github/workflows/ccpp.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: get dependencies
-      run:  sudo apt-get install git cmake python3-dev g++ libpcre3 libpcre3-dev libgmp3-dev libgtkmm-3.0-dev libboost-all-dev libgmp-dev libsqlite3-dev uuid-dev texlive-base python3-mpmath python3-sympy python3-gmpy2 && pip3 install sympy
+      run:  sudo apt-get install git cmake python3-dev g++ libpcre3 libpcre3-dev libgmp3-dev libgtkmm-3.0-dev libboost-all-dev libgmp-dev libsqlite3-dev uuid-dev texlive-base python3-mpmath python3-sympy python3-gmpy2 python3-setuptools && pip3 install sympy
     - name: configure
       run:  mkdir build && cd build && cmake -DENABLE_MATHEMATICA=OFF ..
     - name: make