Add another missing await

webservice/webservice.py

@@ -211,7 +211,7 @@ async def run_proc_async(cmd: List[str]) -> (int, bytes):
     Returns the numeric exit code and stdout (bytes)
     """
     proc = await asyncio.create_subprocess_exec(*cmd, stdout=asyncio.subprocess.PIPE)
-    stdout, _ = proc.communicate()
+    stdout, _ = await proc.communicate()
     return proc.returncode, stdout