update rbi, add tool versions and make gem-rbis command

upgrade tapioca version

bump ruby and tapioca versions

release 0.0.14

add relation type to railtie and compiler to generate it into rbis

fix state machines name collision, add base relation types to railtie…

…, restrict tapioca version

fix bugs in paperclip and state machines compilers

support abstract classes with state machines

generate non-nil associations when validation on association or fk

generate non-nil associations when validation on association or fk