Merge pull request #69 from iden3/develop

Sync develop to master

Add support to return multiple states (#66)

* Add support to return multiple states

Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

* Add checks on the nOuts

Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

* Change hashWithState() to HashWithStateEx()

Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

* Add tests for HashWithStateEx()

Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

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Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

Add one more test vector for TestHashWithState

Switch to Apache 2.0 / MIT licenses (#54)

* Switch to Apache 2.0 / MIT licenses

Poseidon Sponge Hash with different frame sizes (#52)

* Poseidon Sponge Hash with different frame sizes
* Update deps. Bump go version
* Update & fix linter.
* Refactor a bit.
* Reduce gc pressure

Poseidon Sponge Hash implemented (#45)

* Poseidon Sponge Hash implemented
* Linter fixes and GHA go versions updated

Faster ff arithmetics (regenerated code with the newest goff) (#43)

Fix Poseidon Hash check for inputs being in Finite Field (#42)

Better keccac256 (#41)

* Switch to keccac256 implementation from golang.org/x/crypto instead of go-ethereum

made optimizaitions for consts init (#40)