generator-bat

fix(generators): fix capitalization of first letter

Try to stick with `lodash` string functions to the extend possible.

Both `lodash` and `unsercore.string` methods are being used. Both have a
`capitalize` method, but these do not do the same thing and so its use
is confusing.

`lodash.upperFirst` is like `u.s.capitalize` (without arguments). The
lodash names more accurately describe their purpose, so prefer those if
there is a choice. Ditto for `lowerFirst` vs. `decapitalize`.