CI: Colorize and widen Pytest summary

Pytest shows some error messages only in summary while also truncating lines there.

.github/workflows/test.yml

@@ -44,7 +44,9 b' jobs:'
         cp /tmp/ipy_coverage.xml ./
         cp /tmp/.coverage ./
     - name: pytest
+      env:
+        COLUMNS: 120
       run: |
-        pytest -v --cov --cov-report=xml
+        pytest --color=yes -v --cov --cov-report=xml
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v2

appveyor.yml

@@ -3,6 +3,9 b' matrix:'
   fast_finish: true     # immediately finish build once one of the jobs fails.
 
 environment:
+  global:
+    COLUMNS: 120  # Appveyor web viwer window width is 130 chars
+
   matrix:
 
    - PYTHON: "C:\\Python37-x64"
@@ -30,7 +33,7 b' install:'
 test_script:
   - iptest --coverage xml
   - cd ..
-  - pytest -ra --cov --cov-report=xml
+  - pytest --color=yes -ra --cov --cov-report=xml
 on_finish:
   - curl -Os https://uploader.codecov.io/latest/windows/codecov.exe
   - codecov -e PYTHON_VERSION,PYTHON_ARCH