Update test workflow for GitHub action

* .github/workflows/test.yml: Do it.

Author: nnicandro

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        emacs-version: [26.3, 27.2, 28.2, snapshot]
+        emacs-version: [27.2, 28.2, 29.3, snapshot]
     defaults:
       run:
         shell: bash -el {0}
@@ -20,7 +20,7 @@ jobs:
         with:
           version: ${{ matrix.emacs-version }}
         if: ${{ matrix.os == 'windows-latest' }}
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           python-version: 3.9
       - name: Install requirements