Bump contracts interfaces versions according to the already merged PRs (#548)

contracts/ERC677BridgeToken.sol

@@ -46,7 +46,7 @@ contract ERC677BridgeToken is IBurnableMintableERC677Token, DetailedERC20, Burna
     }
 
     function getTokenInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) {
-        return (2, 2, 0);
+        return (2, 4, 0);
     }
 
     function superTransfer(address _to, uint256 _value) internal returns (bool) {

contracts/PermittableToken.sol

@@ -163,9 +163,4 @@ contract PermittableToken is ERC677BridgeToken {
     function _now() internal view returns (uint256) {
         return now;
     }
-
-    /// @dev Version of the token contract.
-    function getTokenInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) {
-        return (2, 3, 0);
-    }
 }

contracts/upgradeable_contracts/VersionableBridge.sol

@@ -2,7 +2,7 @@ pragma solidity 0.4.24;
 
 contract VersionableBridge {
     function getBridgeInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) {
-        return (5, 1, 0);
+        return (5, 2, 0);
     }
 
     /* solcov ignore next */

contracts/upgradeable_contracts/amb_erc677_to_erc677/BasicAMBErc677ToErc677.sol

@@ -96,7 +96,7 @@ contract BasicAMBErc677ToErc677 is
     }
 
     function getBridgeInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) {
-        return (1, 2, 1);
+        return (1, 3, 0);
     }
 
     function getBridgeMode() external pure returns (bytes4 _data) {

contracts/upgradeable_contracts/amb_erc677_to_erc677/BasicStakeTokenMediator.sol

@@ -4,7 +4,7 @@ import "./BasicAMBErc677ToErc677.sol";
 
 contract BasicStakeTokenMediator is BasicAMBErc677ToErc677 {
     function getBridgeInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) {
-        return (1, 1, 0);
+        return (1, 2, 0);
     }
 
     function getBridgeMode() external pure returns (bytes4 _data) {