chore: remove deprecated datetime uses + update lockfile

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Poetry
-        run: python -m pip install poetry==1.8.1
+        run: python -m pip install poetry==1.8.2
       - name: Install dependencies
         run: python -m poetry install
       - name: Test

bento_wes/utils.py

@@ -1,8 +1,8 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 
 __all__ = ["iso_now"]
 
 
 def iso_now() -> str:
-    return datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ")  # ISO date format
+    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")  # ISO date format

tox.ini

@@ -8,7 +8,7 @@ allowlist_externals =
     mkdir
     poetry
 commands =
-    poetry install
+    poetry install --sync
     mkdir -p ./tmp
     poetry run pytest -svv --cov=bento_wes --cov-branch {posargs}
     poetry run flake8 ./bento_wes ./tests