Update software versions in publish.yml (#466)

* Update Python used in publish.yml to 3.9

* Use Julia 1.6 in publish.yml

* Update pypa/gh-action-pypi-publish to v1.4.2

Author: tkf

.github/workflows/publish.yml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install setuptools and wheel
         run: |
           python -m pip install --user setuptools wheel
@@ -29,7 +29,7 @@ jobs:
         if: >-
           (github.ref == 'refs/heads/release/test') ||
           (github.ref == 'refs/heads/release/main')
-        uses: pypa/gh-action-pypi-publish@bce3b74dbf8cc32833ffba9d15f83425c1a736e0  # v1.3.1
+        uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29  # v1.4.2
         with:
           password: ${{ secrets.test_pypi_password }}
           repository_url: https://test.pypi.org/legacy/
@@ -40,14 +40,14 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Set up Julia
         uses: julia-actions/setup-julia@v1
         with:
-          version: ^1.5.0-rc1
+          version: '1.6'
       - name: Install tox
         run: python -m pip install --user tox
       - run: cd ci/test-upload && python -m tox
@@ -59,17 +59,17 @@ jobs:
       matrix:  # using `matrix` to define a constant
         package: ['julia==0.5.7.dev']
     steps:
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Download from TestPyPI
         run: |
           pip download --dest dist --no-deps --index-url https://test.pypi.org/simple/ ${{ matrix.package }}
           pip download --dest dist --no-deps --index-url https://test.pypi.org/simple/ ${{ matrix.package }} --no-binary :all:
       - run: ls -lh dist
       - name: Publish distribution 📦 to PyPI
         if: github.ref == 'refs/heads/release/main'
-        uses: pypa/gh-action-pypi-publish@bce3b74dbf8cc32833ffba9d15f83425c1a736e0  # v1.3.1
+        uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29  # v1.4.2
         with:
           password: ${{ secrets.pypi_password }}