cannot install SQL::NamedPlaceholder if Module::Install::TestBase is not installed

I cannot install this module if Module::Install::TestBase is not installed.  it is because SQL-NamedPlaceholder-0.02 doesn't have Module::Install::TestBase in inc directory.

I fix it by using minilla to manage this module.  I use ```minilla migrate``` after installing latest Minilla(0.5.6).

In addition, I wrote abstract of this module, because it was needed for minillize.