Where is ERC20Mintable.sol in OpenZeppelin Contracts 3.0?

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Hi @Ro5s,

I suggest having a look at ERC20PresetMinterPauser in OpenZeppelin Contracts v3.0 depending where you are in the development cycle so you could update to Solidity 0.6 and OpenZeppelin Contracts 3.x.

I noticed that LexTokenFactory.sol has been flattened (I assume you used a flattener). I would recommend not flattening and only importing the OpenZeppelin Contracts for security and readability.

Note: Solidity 0.6.8 introduces SPDX license identifiers and the compiler will error if you have multiple license identifiers which you would get from flattening.

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