Update requests from 2.18.2 to 2.18.3 (#2676)

requirements/common.txt

@@ -132,9 +132,9 @@ openapi-codec==1.3.2 \
 itypes==1.1.0 --hash=sha256:c6e77bb9fd68a4bfeb9d958fea421802282451a25bac4913ec94db82a899c073
 uritemplate==3.0.0 --hash=sha256:1b9c467a940ce9fb9f50df819e8ddd14696f89b9a8cc87ac77952ba416e0a8fd
 
-requests==2.18.2 \
-    --hash=sha256:414459f05392835d4d653b57b8e58f98aea9c6ff2782e37de0a1ee92891ce900 \
-    --hash=sha256:5b26fcc5e72757a867e4d562333f841eddcef93548908a1bb1a9207260618da9
+requests==2.18.3 \
+    --hash=sha256:b62be4ec5999c24d10c98d248a136e7db20ca6616a2b65060cd9399417331e8a \
+    --hash=sha256:fb68a7baef4965c12d9cd67c0f5a46e6e28be3d8c7b6910c758fbcc99880b518
 
 # Required by django.contrib.migrations
 sqlparse==0.2.3 \