* added require revert strings to contracts; modified semaphore contract test to check for said strings
upgraded snarkjs commit hash
added revert reason test for verifier-gte-snark-scalar-field
updated package-lock.json and circleci snark file cache
* removed broadcaster address check from semaphore contract; added solidity syntax highlighting for github
* Removed broadcaster address public input in the circuit and in the
contract
Updated tests
Updated snark cache for circleci
Former-commit-id: fccedd776f
