Small change to dependency

• Substack's node-buffers npm module has not kept up with deprecations, therefore this dependency was forked

SHA512
600481418255129efbeb8e1e65c3b7bace762a4a4d2a8c9e37ab31b54fa6f68f929b6951117e08b816a578f6ae58edc41ad7d02d9e799819861c4194256b639d bitcore-p2p.tgz

SHA256
3af1dbb06ec576d0b9473c03c10e18df65cde9ca6249a40ebb427224f564cb9c bitcore-p2p.tgz

fingerprint:
F8B0 891C C459 C197 65C2 5043 3319 5D27 EF6B DB7F

v0.14.0

upgrade bitcore to v0.12.0