Upgrade psycopg2 from 2.6.2 to 2.7.3.2

This fixes a bug where psycopg2 is unable to determine postgresql versions
>10.x (see psycopg/psycopg2#489).

requirements.in

@@ -11,7 +11,7 @@ github3.py==0.9.6
 goodtables[ods]==1.5.1
 gunicorn==19.6.0
 jsonschema==2.5.1
-psycopg2==2.6.2
+psycopg2
 python-dotenv==0.6.0
 pyyaml==3.12.0
 raven[flask]==6.0.0

requirements.txt

@@ -34,19 +34,19 @@ ijson==2.3                # via tabulator
 isodate==0.6.0            # via tableschema
 itsdangerous==0.24        # via flask
 jdcal==1.3                # via openpyxl
-Jinja2==2.9.6             # via flask
+jinja2==2.9.6             # via flask
 jmespath==0.9.3           # via boto3, botocore
 jsonlines==1.2.0          # via tabulator
 jsonpointer==1.13         # via datapackage
 jsonschema==2.5.1
 kombu==4.1.0              # via celery
 linear-tsv==1.0.0         # via tabulator
 lxml==3.8.0               # via goodtables, tabulator
-Mako==1.0.7               # via alembic
-MarkupSafe==1.0           # via jinja2, mako
+mako==1.0.7               # via alembic
+markupsafe==1.0           # via jinja2, mako
 oauthlib==2.0.6           # via flask-oauthlib, requests-oauthlib
 openpyxl==2.4.9           # via tabulator
-psycopg2==2.6.2
+psycopg2==2.7.3.2
 pyasn1==0.3.7             # via cryptography
 pycparser==2.18           # via cffi
 python-dateutil==2.6.1    # via botocore, tableschema
@@ -71,8 +71,5 @@ unicodecsv==0.14.1        # via datapackage, tableschema, tabulator
 uritemplate.py==3.0.2     # via github3.py
 uritemplate==3.0.0        # via uritemplate.py
 vine==1.1.4               # via amqp
-Werkzeug==0.12.2          # via flask
+werkzeug==0.12.2          # via flask
 xlrd==1.1.0               # via tabulator
-
-# The following packages are considered to be unsafe in a requirements file:
-# setuptools                # via cryptography