454e77c Add PEP249 required type definitions

569babd Unsupported functions raiaes NotSupportedError
f0efe0e Define all DBAPI required errors in prestodb.exceptions
1262f1b Add Cursor#close() and #executemany() required by PEP 249
1ed09e0 Set meaningless 5 items to None in Cursor.description
2caf04b Fix SET SESSION support by using http_response.headers
7c65767 Pass auth module to PrestoRequest for testing auth fail
4ebeb58 Add `get_exceptions()` to the Authentication module
b022322 Check requests_kerberos availability right before it's used
dfe0240 Make the library runnable w/ and w/o requests_kerberos
25cf54c Enable run tests with full dependency including extras_require
7d48556 Make request_kerberos dependency optional
ef7d571 Use lighter weight six for python3 compatibility
cd986e6 Fix transaction creation
f7358a2 Add need help? section to the README

unpin requirements

I'd like to propose not strictly pinning dependencies in this package, allowing users of this library to have their own pinned versions instead. If accepted and released, fantastic! If rejected, I'll make a fork (for now) that allows us to relax the dependencies.

Bump version to 0.5.0