lock libv8 to 3.16.14.7 for 1.8.7
lock libv8 to 3.16.14.7 for 1.8.7

zBMNForks/sinatra-contrib,mwpastore/sinatra-contrib,sferik/sinatra-contrib,mwpastore/sinatra-contrib,gferguson-gd/sinatra-contrib,gferguson-gd/sinatra-contrib,chicisimo/sinatra-contrib,zBMNForks/sinatra-contrib,TimurTarasenko/sinatra-contrib,chicisimo/sinatra-contrib,TimurTarasenko/sinatra-contrib,sferik/sinatra-contrib