Bump pyserial-asyncio from 0.4 to 0.6

Bumps [pyserial-asyncio](https://github.com/pyserial/pyserial-asyncio) from 0.4 to 0.6.
- [Release notes](https://github.com/pyserial/pyserial-asyncio/releases)
- [Commits](pyserial/pyserial-asyncio@v0.4...v0.6)

---
updated-dependencies:
- dependency-name: pyserial-asyncio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -24,7 +24,7 @@ dependencies = [
     "ruamel.yaml == 0.15.42",  # newer than this requires c requires compiled c lib, currently no Mac arm versions
     "pyserial == 3.5",
     "pyserial-asyncio == 0.4; platform_system=='Windows'",
-    "pyserial-asyncio == 0.5; platform_system!='Windows'",
+    "pyserial-asyncio == 0.6; platform_system!='Windows'",
     "sortedcontainers == 2.3.0",
     "psutil == 5.9.4",
     "packaging",