Update httpx requirement from <0.16,>=0.14 to >=0.14,<0.17

Updates the requirements on [httpx](https://github.com/encode/httpx) to permit the latest version.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.14.0...0.16.0)

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

setup.py

@@ -22,7 +22,7 @@
         "Operating System :: OS Independent",
     ],
     install_requires=[
-        "httpx>=0.14,<0.16",
+        "httpx>=0.14,<0.17",
         "protobuf",
         "zeroconf>=0.27.0",
     ],