Switch to new snappy

[twoeths]

Motivation

• The Old snappy (v6.3.5) is deprecated https://github.com/kesla/node-snappy
• Consider switching to the new implementation at https://github.com/Brooooooklyn/snappy (v7.1.1)

for more information Brooooooklyn/snappy#16

[wemeetagain]

Lets use Brooklyn's snappy