fix: PEP625 compliance (#52)

Author: BobTheBuidler

.github/workflows/release.yaml

@@ -143,11 +143,16 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install setuptools wheel twine mypy==1.18.2 hexbytes==1.3.1
-
+          pip install setuptools wheel twine mypy==1.18.2
+
+      - name: Drop build folder to prevent shadowing issues w/ the PyPA “build” module
+        run: rm -rf build
+      
+      - name: Install PyPA “build” module
+        run: pip install -U build
+      
       - name: Build sdist
-        run: |
-          python setup.py sdist
+        run: python -m build --sdist
 
       # ----------------------------------------------------
       # Download wheels built on each runner