update changelog

CHANGELOG.md

@@ -12,6 +12,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-asgi` now returns a `traceresponse` response header.
   ([#817](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/817))
 
+- `opentelemetry-instrumentation-httpx` now supports versions higher than `0.19.0`.
+  ([#866](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/866))
+
 ### Fixed
 
 - `opentelemetry-instrumentation-flask` Flask: Conditionally create SERVER spans

instrumentation/opentelemetry-instrumentation-httpx/src/opentelemetry/instrumentation/httpx/__init__.py

@@ -234,7 +234,7 @@ def _prepare_headers(headers: typing.Optional[Headers]) -> httpx.Headers:
 
 
 def extract_parameters(args, kwargs):
-    if type(args[0]) == httpx.Request:
+    if isinstance(args[0], httpx.Request):
         request: httpx.Request = args[0]
         method = request.method.encode()
         url = request.url
@@ -256,7 +256,7 @@ def extract_parameters(args, kwargs):
 def inject_propagation_headers(headers, args, kwargs):
     _headers = _prepare_headers(headers)
     inject(_headers)
-    if type(args[0]) == httpx.Request:
+    if isinstance(args[0], httpx.Request):
         request: httpx.Request = args[0]
         request.headers = _headers
     else:
@@ -321,7 +321,7 @@ def handle_request(
 
             inject_propagation_headers(headers, args, kwargs)
             response = self._transport.handle_request(*args, **kwargs)
-            if type(response) == httpx.Response:
+            if isinstance(response, httpx.Response):
                 response: httpx.Response = response
                 status_code = response.status_code
                 headers = response.headers
@@ -401,7 +401,7 @@ async def handle_async_request(
             response = await self._transport.handle_async_request(
                 *args, **kwargs
             )
-            if type(response) == httpx.Response:
+            if isinstance(response, httpx.Response):
                 response: httpx.Response = response
                 status_code = response.status_code
                 headers = response.headers