Use the Travis supplied PostgreSQL
Don't create one off databases, instead drop and recreate the schema
Properly install PyPy
Remove unused import
Merge pull request #170 from dstufft/fix-travis

Use the Travis supplied PostgreSQL
Generate the release (version=13.12.0 build=c6f8742) [ci skip]
Merge branch 'master' of https://github.com/pypa/warehouse into xmlrpc-encoding-fix