Pin async-timeout to 4.0.3 and update pip dependencies

Change-Id: Ie2cc2a1f65fd06c8e8ddb7b2f50ee00f9bebeb7c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/requirements-dev.txt b/requirements-dev.txt
index dab87e2..3b1d1e4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -16,7 +16,7 @@
 
 aiokafka==0.12.0
     # via -r https://osm.etsi.org/gitweb/?p=osm/common.git;a=blob_plain;f=requirements.txt;hb=master
-async-timeout==5.0.1
+async-timeout==4.0.3
     # via
     #   -r https://osm.etsi.org/gitweb/?p=osm/common.git;a=blob_plain;f=requirements.txt;hb=master
     #   aiokafka