update new contracts for solidity 0.7

contracts/mocks/ClashingImplementation.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 
 /**

contracts/mocks/DummyImplementation.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 abstract contract Impl {
   function version() public pure virtual returns (string memory); 

contracts/mocks/InitializableMock.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "../proxy/Initializable.sol";
 

contracts/mocks/MultipleInheritanceInitializableMocks.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "../proxy/Initializable.sol";
 

contracts/mocks/RegressionImplementation.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "../proxy/Initializable.sol";
 

contracts/mocks/SingleInheritanceInitializableMocks.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "../proxy/Initializable.sol";
 

contracts/proxy/Initializable.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity >=0.4.24 <0.7.0;
+pragma solidity >=0.4.24 <0.8.0;
 
 
 /**

contracts/proxy/Proxy.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 /**
  * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM

contracts/proxy/ProxyAdmin.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "../access/Ownable.sol";
 import "./TransparentUpgradeableProxy.sol";

contracts/proxy/TransparentUpgradeableProxy.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "./UpgradeableProxy.sol";
 
@@ -30,7 +30,7 @@ contract TransparentUpgradeableProxy is UpgradeableProxy {
      * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
      * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
      */
-    constructor(address _logic, address _admin, bytes memory _data) public payable UpgradeableProxy(_logic, _data) {
+    constructor(address _logic, address _admin, bytes memory _data) payable UpgradeableProxy(_logic, _data) {
         assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
         _setAdmin(_admin);
     }

contracts/proxy/UpgradeableProxy.sol

 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.6.0;
+pragma solidity ^0.7.0;
 
 import "./Proxy.sol";
 import "../utils/Address.sol";
@@ -21,7 +21,7 @@ contract UpgradeableProxy is Proxy {
      * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
      * function call, and allows initializating the storage of the proxy like a Solidity constructor.
      */
-    constructor(address _logic, bytes memory _data) public payable {
+    constructor(address _logic, bytes memory _data) payable {
         assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
         _setImplementation(_logic);
         if(_data.length > 0) {