Feature/migrate poseidon

[arnaucube]

• update test vectors for new babyjubjub B8 from circomlib
• add Poseidon multiHash & hashBufer, add MiMC7 & Poseidon wrappers for hash, multiHash, hashBuffer. Add canary.test.js for MiMC7 & Poseidon & BabyJubJub

Unit tests fail due a test in src/protocols/login.test.js, is an old impl using old generated data, need to be updated, but not in this PR