Fix bad default value for Factory.declarations (Closes #162).
Fix bad default value for Factory.declarations (Closes #162).

adamchainz/factory_boy,QuantumGhost/factory_boy,yograterol/factory_boy,muhammad-ammar/factory_boy,kamotos/factory_boy,rbarrois/factory_boy,fizista/factory_boy,mapleoin/factory_boy,FactoryBoy/factory_boy,rrauenza/factory_boy,dpausp/factory_boy