some Tests need access network

[Hamzaelkhatri]

Some tests in Quest 1 need network access to check the validation of the exercise using External API
but the platform uses -network none to run docker image, so it's not possible to use the external API for testing
also, I found in quest3 npx hardhat test for the first time, download the version 0.8.4 of the solidity

[Xalava]

Fully solved in demo exercises in the tests/ folder.
Other exercises might require light adaptations.