fix license and sol versions

script/AddressReaderWriter.s.sol

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 pragma solidity ^0.8.25;
 
 import {Script} from "forge-std/Script.sol";

src/Bech32m.sol

@@ -2,6 +2,7 @@
 // https://github.com/gregdhill/bech32-sol/blob/master/src/Bech32.sol
 // based on https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki
 // https://github.com/sipa/bech32/blob/master/ref/python/segwit_addr.py
+
 pragma solidity ^0.8.25;
 
 error EncodingIsUnknown();

src/Deriver.sol

@@ -1,4 +1,5 @@
-// SPDX-License-Identifier: UNLICENSED
+// SPDX-License-Identifier: MIT
+
 pragma solidity ^0.8.25;
 
 import {EllipticCurve} from "../lib/elliptic-curve-solidity/contracts/EllipticCurve.sol";

src/Tools.sol

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 pragma solidity ^0.8.25;
 
 import {Script} from "forge-std/Script.sol";

test/BTCDepositAddressDeriver.t.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.19;
+pragma solidity ^0.8.25;
 
 import {console} from "forge-std/console.sol";
 import {Test} from "forge-std/Test.sol";

test/Bech32m.t.sol

@@ -1,5 +1,6 @@
-// Solidity Version: ^0.8.13
-pragma solidity ^0.8.19;
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.25;
 
 import {Test, console} from "forge-std/Test.sol";
 import {Bech32m} from "../src/Bech32m.sol";

test/Deriver.t.sol

@@ -1,5 +1,6 @@
-// SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.25;
 
 import {Test, console} from "forge-std/Test.sol";
 import {Deriver} from "../src/Deriver.sol";