requests: Add context manager for response object.

When accessing response.raw it's not always obvious you should call
`response.close()` to close and free the socket.  Since lwIP can have a
socket limit this can very quickly result in cryptic ENOMEM errors.

This matches the official requests which has the same context manager on
`Response` objects.

Signed-off-by: Phil Howard <github@gadgetoid.com>

Author: Gadgetoid

python-ecosys/requests/manifest.py

@@ -1,3 +1,3 @@
-metadata(version="0.10.2", pypi="requests")
+metadata(version="0.11.0", pypi="requests")
 
 package("requests")

python-ecosys/requests/requests/__init__.py

@@ -32,6 +32,12 @@ def json(self):
 
         return json.loads(self.content)
 
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+
 
 def request(
     method,