simply import the public names from the `sqlbuilder.sql` module instead of expicitly importing them again here
replaced `Value` class with `SQL.wrap` method as the `L` shorthand
Ordering clauses no longer available as magic attributes on all expressions, but as separate `ASC`/`DESC` functions
`VALUES` moved to `TABLE` and query base classes moved to `sql.query`
`.AS` alias-producing methods removed in favor of `A.<alias>(expression)` notation
named methods removed from expressions in favor of standalone functions (i.e. `C.foo.AND(C.bar)` is now `AND(C.foo, C.bar)`