Added hardhat-truffle5 setup with broken fixtures (migrations) and bumped contracts to Solidity v0.8#21

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Ungolim wants to merge 2 commits intomudgen:masterfrom Ungolim:feat/hardhat+solc-0.8

+45,864-3,492

Commits on Feb 16, 2021

Added Hardhat-Truffle5 setup with broken fixtures (migrations) and bumped contracts to Solidity to v0.8
Ungolim
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Commits on Feb 17, 2021

Some tests now work thanks to...
Ungolim
committed