colorize the pytest output (#265)

set `FORCE_COLOR` to force `pytest` to output colors

Author: keewis

.github/workflows/ci-additional.yml

@@ -23,6 +23,9 @@ jobs:
       matrix:
         python-version: ["3.12"]
 
+    env:
+      FORCE_COLOR: 3
+
     steps:
     - name: checkout
       uses: actions/checkout@v4

.github/workflows/ci.yml

@@ -36,6 +36,9 @@ jobs:
       run:
         shell: bash -l {0}
 
+    env:
+      FORCE_COLOR: 3
+
     if: |
       always()
       && github.repository == 'xarray-contrib/pint-xarray'

.github/workflows/nightly.yml

@@ -58,6 +58,9 @@ jobs:
     outputs:
       artifacts_availability: ${{ steps.status.outputs.ARTIFACTS_AVAILABLE }}
 
+    env:
+      FORCE_COLOR: 3
+
     steps:
     - name: checkout the repository
       uses: actions/checkout@v4