add wcwidth>=0.6.0 as a dependency of the github workflows

Author: astanin

.github/workflows/tabulate.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install pytest numpy pandas
+        python -m pip install pytest numpy pandas "wcwidth>=0.6.0"
     - name: Run tests
       run: |
-        pytest -v --doctest-modules --ignore benchmark/benchmark.py
+        pytest -v --doctest-modules --ignore benchmark