refactor: update pragmas (#11)

* refactor: update pragmas

* fix: fix

Author: barrutko

src/Arbitrum.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.13;
+pragma solidity >=0.8.0;
 
 library Arbitrum {
 

src/Base.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.13;
+pragma solidity >=0.8.0;
 
 library Base {
 

src/Ethereum.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.13;
+pragma solidity >=0.8.0;
 
 library Ethereum {
 

src/Gnosis.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.13;
+pragma solidity >=0.8.0;
 
 library Gnosis {
 

src/Optimism.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.13;
+pragma solidity >=0.8.0;
 
 library Optimism {