fix: passing the table DB name to the enum-generation steps

[wuleninja]

Solves #98

[mysql]

This changes allows to use the table name while generating file names or struct
names (in Go) for enums, which may help avoid name collisions (2 tables might
have 2 different enums but with the same column name).

Also: updated the dependencies with dep ensure.

[natefinch]

Can you back out the changes to the vendor directory? I don't want 33,000 lines of changes with this very tiny fix :) We can update the vendor directory separately :)

[wuleninja]

This should be better now (if the tests pass)

[natefinch]

Thanks!

[wuleninja]

Thanks to you !