ConversionFeeDenom param missing from GetParams in MsgFees module.

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Summary of Bug

The ConversionFeeDenom is missing in the GetParams() method of the msgfees module.

Currently:

// GetParams returns the total set of distribution parameters.
func (k Keeper) GetParams(ctx sdk.Context) (params types.Params) {
	return types.Params{
		FloorGasPrice:  k.GetFloorGasPrice(ctx),
		NhashPerUsdMil: k.GetNhashPerUsdMil(ctx),
	}
}

Required:

// GetParams returns the total set of distribution parameters.
func (k Keeper) GetParams(ctx sdk.Context) (params types.Params) {
	return types.Params{
		FloorGasPrice:  k.GetFloorGasPrice(ctx),
		NhashPerUsdMil: k.GetNhashPerUsdMil(ctx),
		ConversionFeeDenom: k.GetConversionFeeDenom(ctx),
	}
}

Version

Steps to Reproduce

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