Rename 'close' to 'aclose' on Client (#675)

* Switch to aclose on Client

* Fix reference to aclose in API docs

docs/advanced.md

@@ -21,14 +21,14 @@ The recommended way to use a `Client` is as a context manager. This will ensure
 <Response [200 OK]>
 ```
 
-Alternatively, you can explicitly close the connection pool without block-usage using `.close()`:
+Alternatively, you can explicitly close the connection pool without block-usage using `.aclose()`:
 
 ```python
 >>> client = httpx.Client()
 >>> try:
 ...     r = await client.get('https://example.com')
 ... finally:
-...     await client.close()
+...     await client.aclose()
 ...
 >>> r
 <Response [200 OK]>

docs/api.md

@@ -36,7 +36,7 @@
 
 ::: httpx.Client
     :docstring:
-    :members: headers cookies params request get head options post put patch delete build_request send close
+    :members: headers cookies params request get head options post put patch delete build_request send aclose
 
 ## `Response`
 

httpx/client.py

@@ -865,7 +865,7 @@ class Client:
             trust_env=trust_env,
         )
 
-    async def close(self) -> None:
+    async def aclose(self) -> None:
         await self.dispatch.close()
 
     async def __aenter__(self) -> "Client":
@@ -877,7 +877,7 @@ class Client:
         exc_value: BaseException = None,
         traceback: TracebackType = None,
     ) -> None:
-        await self.close()
+        await self.aclose()
 
 
 def _proxies_to_dispatchers(
@@ -956,4 +956,4 @@ class StreamContextManager:
     ) -> None:
         await self.response.aclose()
         if self.close_client:
-            await self.client.close()
+            await self.client.aclose()