Update mozdef-util version to support python3 install

requirements.txt

@@ -25,15 +25,15 @@ google-api-python-client==1.4.0
 hjson==2.0.2
 httplib2==0.9.2
 idna==2.6
-ipaddr==2.1.11
+ipaddr==2.2.0
 ipaddress==1.0.17
 ipwhois==0.15.0
 jmespath==0.9.3
 kombu==4.1.0
 meld3==1.0.2
 mozdef-client==1.0.11
-mozdef-util==2.0.0
-netaddr==0.7.1
+mozdef-util==2.0.3
+netaddr==0.7.19
 nose==1.3.7
 oauth2client==1.4.12
 packaging==16.8
@@ -51,12 +51,11 @@ requests-jwt==0.5.3
 requests==2.20.0
 requests-futures==0.9.7
 rsa==3.1.4
-s3cmd==1.0.1
 setuptools-scm==1.11.1
 simplejson==3.13.2
 six==1.11.0
 slackclient==1.0.9
-supervisor==3.3.1
+supervisor==4.0.3
 tzlocal==1.4
 uritemplate==0.6
 urllib3==1.24.3