Compiler error: Documentation tag @custom:oz-upgrades-unsafe-allow not valid for contracts.

[ghost]

💻 Environment Use solc Version: 0.8.0+commit.c7dfd78e.

📝 Details Compiler error: When compiling https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/master/contracts/proxy/utils/Initializable.sol#L50

error: Documentation tag @custom:oz-upgrades-unsafe-allow not valid for contracts.

🔢 Code to reproduce bug

1. Clone Repo
2. Flatten this file https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/master/contracts/proxy/utils/Initializable.sol to pull all the other dependencies.
3. Compile the contracts using solc 0.8.0
4. you get the error error: Documentation tag @custom:oz-upgrades-unsafe-allow not valid for contracts.

[frangio]

Thanks @seanamani. The minimum required Solidity version for this file is now 0.8.2. We forgot to bump the pragma.