Ensure uvicorn is version 0.15.0.

This is to ensure that the test tests/system/test_astacus.py:test_astacus

pyproject.toml

@@ -34,7 +34,7 @@ dependencies = [
     "sentry-sdk",
     "tabulate",
     "typing-extensions >= 4.7.1",
-    "uvicorn",
+    "uvicorn==0.15.0",
     "wcmatch",
 ]
 
@@ -45,13 +45,13 @@ dev = [
     # pre-commit tasks in Makefile need these"
     "anyio==3.5.0",
     "pylint==2.15.5",
-    "pytest-asyncio==0.14.0",
+    "pytest-asyncio==0.21.1",
     "pytest-cov==3.0.0",
     "pytest-mock==3.3.1",
     "pytest-order==1.0.0",
     "pytest-timeout==1.4.2",
     "pytest-watch==4.2.0",
-    "pytest==6.2.5",
+    "pytest==7.2.2",
     # pinning mypy to the same version as pre-commit"
     "mypy==1.0.0",
     # types for things that don't seem to have them"