GHA: Update deploy_pypi.yml (#49)

Set up for trusted publishing.

.github/workflows/deploy_pypi.yml

@@ -1,4 +1,4 @@
-name: Deploy
+name: Deploy package to PyPI
 
 on:
   release:
@@ -7,30 +7,29 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ['3.9']
+    environment:
+      name: pypi
+      url: https://pypi.org/p/fiddy
+    permissions:
+      id-token: write
 
     steps:
-    - name: Check out repository
-      uses: actions/checkout@v4
-
-    - name: Prepare python ${{ matrix.python-version }}
+    - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: "3.12"
+
+    - name: Check out repository
+      uses: actions/checkout@v4
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        pip install setuptools wheel build
 
     - name: Build distribution package
       run: |
-        python setup.py sdist bdist_wheel
+        python -m build -s
 
     - name: Publish a Python distribution to PyPI
-      uses: pypa/gh-action-pypi-publish@master
-      with:
-        user: __token__
-        password: ${{ secrets.PYPI_API_TOKEN }}
+      uses: pypa/gh-action-pypi-publish@release/v1