Fix aliasing of HasMany and ManyToMany relations (recreated PR)

[DeanMauro]

buildFilter() aliases relations that are not OneToOne, but fullColumnName() does not, the result being that filters on fields nested in HasMany or ManyToMany relations fail.

This commit makes the fullColumnName() method alias all such relations.

Resolves https://github.com/Vincit/objection-find/issues/80