Replace Boom with Hey (#1148)
Replace Boom with Hey (#1148)

[Boom](https://github.com/rakyll/boom) has been renamed to [Hey](https://github.com/rakyll/hey) because of a name conflict with another binary.
The old URL is still working but users are encouraged to change to the new one.
vishr/awesome-go,bscott/awesome-go,pconcepcion/awesome-go,jmelfi/awesome-go,Oire/awesome-go,abhishekgahlot/awesome-go,subodhchhabra/awesome-go,theckman/awesome-go,avelino/awesome-go,joeybloggs/awesome-go,hvnsweeting/awesome-go,sadlil/awesome-go,chrislusf/awesome-go