See if Securify2 is worth adding

[enzoevers]

https://github.com/eth-sri/securify2

Reading the articles below gives the impression that Securify2 does some interesting analysis, but that there are quite some false positives because of this.

• https://www.h-x.technology/blog/top-3-smart-contract-audit-tools
• https://dreamlab.net/en/blog/post/smarts-contracts-security-tools-comparison-mythx-mythril-securify-v20-and-slither-1/
• https://medium.com/coinmonks/ethereum-security-analysis-tools-an-introduction-and-comparison-1096194e64d5