Bump package version to 2.0.0
Bump package version to 2.0.0

bitjson/bitcore,iobond/bitcore,phplaboratory/bitcore,litecoin-project/litecore,iobond/bitcore,bitpay/bitcore,bitpay/bitcore,bitpay/bitcore,bitpay/bitcore,bitjson/bitcore,GroestlCoin/groestlcore,UdjinM6/bitcore-dash,iobond/bitcore,phplaboratory/bitcore,iobond/bitcore,martindale/bitcore,martindale/bitcore,litecoin-project/litecore,iobond/bitcore,martindale/bitcore,martindale/bitcore,bitjson/bitcore,bitjson/bitcore