Mint Close Authority Extension is not supported and breaks creation of LP

[BitCM581]

Hi guys!

I created a new token based off Solana and wanted to now add a LP for my token/solana pair. However, the creation of such LP failed. The transaction shows the following error:

> Program logged: "AnchorError thrown in programs/cp-swap/src/instructions/initialize.rs:171. Error Code: NotSupportMint. Error Number: 6007. Error Message: Not support token_2022 mint extension."
> Program consumed: 89751 of 596107 compute units
> Program returned error: "custom program error: 0x1777"

After digging a bit through the code, the issue seems to be my token using the "Mint Close Authority Extension" since the call to is_supported_mint()

raydium-cp-swap/programs/cp-swap/src/utils/token.rs

Line 176 in cfdb70a

pub fn is_supported_mint(mint_account: &InterfaceAccount<Mint>) -> Result<bool> {

is returning false if an extension is found that is not one of [TransferFeeConfig, MetadataPointer, TokenMetaData]:

        if e != ExtensionType::TransferFeeConfig
            && e != ExtensionType::MetadataPointer
            && e != ExtensionType::TokenMetadata
        {
            return Ok(false);
        }

Is this a "bug" or a feature? It looks like it was a conscious decision to exclude other extensions but I can not think of why this might be an issue.