add Transaction#lockUntil stub
add Transaction#lockUntil stub

pnagurny/bitcore,bitpay/bitcore,bitpay/bitcore,jcvernaleo/bitcore,braydonf/bitcore,TOMOAKI12345/bitcore,martindale/bitcore,TOMOAKI12345/bitcore,maraoz/coinforge,eXcomm/bitcore,bankonme/bitcore,TeamPiggyCoin/PiggyCore,iobond/bitcore,bilthon/bitcore,phplaboratory/bitcore,iobond/bitcore,bitpay/bitcore,bankonme/bitcore,bitjson/bitcore,TeamPiggyCoin/PiggyCore,jcvernaleo/bitcore,bitjson/bitcore,janko33bd/bitcore,williamcotton/bitcore,adjoinant/bitcore,litecoin-project/litecore,olalonde/bitcore,iobond/bitcore,iobond/bitcore,bitpay/bitcore,GroestlCoin/groestlcore,pnagurny/bitcore,bitjson/bitcore,eXcomm/bitcore,martindale/bitcore,adjoinant/bitcore,UdjinM6/bitcore-dash,janko33bd/bitcore,braydonf/bitcore,MonetaryUnit/bitcore,martindale/bitcore,litecoin-project/litecore,martindale/bitcore,genecyber/bitcore,lekkas/bitcore,initaldk/bitcore,initaldk/bitcore,lekkas/bitcore,williamcotton/bitcore,bitjson/bitcore,iobond/bitcore,MonetaryUnit/bitcore,daxxog/clamcore,maraoz/coinforge,genecyber/bitcore,eordano/bitcore,eordano/bitcore,daxxog/clamcore,bilthon/bitcore,olalonde/bitcore,phplaboratory/bitcore