Update boto3 from 1.9.119 to 1.9.121

requirements/prod.txt

@@ -294,9 +294,9 @@ whitenoise==3.3.1 \
     --hash=sha256:9d81515f2b5b27051910996e1e860b1332e354d9e7bcf30c98f21dcb6713e0dd
 django-haystack==2.8.1 \
     --hash=sha256:8b54bcc926596765d0a3383d693bcdd76109c7abb6b2323b3984a39e3576028c
-boto3==1.9.119 \
-    --hash=sha256:25bf66529b94fc9b89928fd5fd004d4a15c7e9603b44692e9652b8fc526699c3 \
-    --hash=sha256:60b6f8ce0f2213b070ad67851466b7e8467061efe9536df467f61402c2110a9f
+boto3==1.9.121 \
+    --hash=sha256:f9361071b1c04760fe2bc187854018a6175105409fe8f51722ca8357c88206fc \
+    --hash=sha256:fcc151dda0e278a1baa1e180b661c6ab2b2d14be29e68fdc88c78402975b7733
 botocore==1.12.121 \
     --hash=sha256:57b98300ed264d1e5abdc22621a36d952488c7b0a1ecad82a3d58e84d2128a8f \
     --hash=sha256:f0eeeb89bbe0464da9499c2705c2fe6ac57ae0276b73b38ffb8638b217887139