Merge pull request #6 from NFTX-project/floating-pragmas-for-interfaces

use floating solc version for interfaces

Author: apoorvlathey

src/interfaces/INFTXFeeDistributorV3.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 import {IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
 import {INFTXRouter} from "@src/interfaces/INFTXRouter.sol";

src/interfaces/INFTXInventoryStakingV3.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 import {IWETH9} from "@uni-periphery/interfaces/external/IWETH9.sol";
 import {IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

src/interfaces/INFTXRouter.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 import {IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
 

src/interfaces/external/IPermitAllowanceTransfer.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 /// @title AllowanceTransfer
 /// @notice Handles ERC20 token permissions through signature based allowance setting and ERC20 token transfers by checking allowed amounts

src/interfaces/external/IUniswapV2Router02.sol

@@ -1,4 +1,4 @@
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 interface IUniswapV2Router02 {
     function swapExactTokensForTokens(

src/interfaces/external/IUniversalRouter.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 interface IUniversalRouter {
     /// @notice Executes encoded commands along with provided inputs. Reverts if deadline has expired.

src/uniswap/v3-periphery/interfaces/ISwapRouter.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 import {IUniswapV3SwapCallback} from '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';
 import {IPeripheryImmutableState} from "./IPeripheryImmutableState.sol";

src/uniswap/v3-periphery/interfaces/external/IWETH9.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-pragma solidity =0.8.15;
+pragma solidity ^0.8.0;
 
 import '@openzeppelin/contracts/token/ERC20/IERC20.sol';