Upgrade to web3py 4.7.2

requirements/base.txt

@@ -25,8 +25,16 @@ sendgrid==5.6.0
 slackclient
 eth-tester
 websockets
-web3==4.5.0
-eth-abi==1.1.1
+eth-abi==1.2.2
+eth-account==0.3.0
+eth-hash[pycryptodome]==0.2.0
+eth-keyfile==0.5.1
+eth-keys==0.2.0b3
+eth-rlp==0.1.2
+eth-typing==1.3.0
+eth-utils==1.3.0b0
+hexbytes==0.1.0
+web3==4.7.2
 mailchimp3
 django_chartit==0.2.9
 MechanicalSoup==0.9.0.post4
@@ -38,7 +46,6 @@ boto==2.49.0
 google-api-python-client
 django-environ==0.4.5
 ipfsapi
-eth-utils==1.0.3
 jsondiff==1.1.1
 social-auth-app-django==2.1.0
 django-ipware==2.0.2
@@ -54,7 +61,6 @@ imageio
 boto3==1.7.81
 django-storages==1.6.6
 easy-thumbnails==2.5
-eth-account==0.2.2
 django-classy-tags==0.8.0
 django-cookie-law==2.0.1
 django-impersonate==1.3