Upgrade dependencies

requirements.txt

@@ -3,8 +3,8 @@ attrs==18.2.0
 beautifulsoup4==4.7.1
 bleach==3.1.0
 blinker==1.4
-boto3==1.9.85
-botocore==1.12.85
+boto3==1.9.86
+botocore==1.12.86
 certifi==2018.11.29
 chardet==3.0.4
 ddtrace==0.20.1
@@ -25,14 +25,14 @@ python-dateutil==2.7.5
 python-decouple==3.1
 pytz==2018.9
 raven==6.10.0
-redis==3.0.1
+redis==3.1.0
 requests==2.21.0
 requests-oauthlib==1.2.0
 s3transfer==0.1.13
 six==1.12.0
 spinach==0.0.9
 urllib3==1.24.1
-waitress==1.2.0
+waitress==1.2.1
 webencodings==0.5.1
 whitenoise==4.1.2
 wrapt==1.11.1