Bump webtest from 3.0.2 to 3.0.3 (#988)

Bumps [webtest](https://github.com/Pylons/webtest) from 3.0.2 to 3.0.3.
- [Commits](Pylons/webtest@3.0.2...3.0.3)

---
updated-dependencies:
- dependency-name: webtest
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -64,7 +64,7 @@ tests = [
   "webargs[frameworks]",
   "pytest",
   "pytest-asyncio",
-  "webtest==3.0.2",
+  "webtest==3.0.3",
   "webtest-aiohttp==2.0.0",
   "pytest-aiohttp>=0.3.0",
   "packaging>=17.0",