Solidity version

README.md

@@ -36,7 +36,7 @@ There are also test mocks which can be seen [here](src/tests/mocks). These are s
 This project is [released as an npm module](https://www.npmjs.com/package/@0xcert/ethereum-erc721). You must install it using the `npm` command:
 
 ```
-$ npm install @0xcert/ethereum-erc721@2.0.0-rc1
+$ npm install @0xcert/ethereum-erc721@2.0.0
 ```
 
 ### Source
@@ -77,7 +77,7 @@ You have created and have possession of unique glass-blown artwork (each having
 To do this, simply paste the code belowe into Remix and deploy the smart contract. You will "mint" a token for each new piece of artwork you want to see. Then you will "burn" that token when you surrender physical possession of the piece.
 
 ```solidity
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "https://github.com/0xcert/ethereum-erc721/src/contracts/tokens/nf-token-metadata.sol";
 import "https://github.com/0xcert/ethereum-erc721/src/contracts/ownership/ownable.sol";

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@0xcert/ethereum-erc721",
-  "version": "2.0.0-rc1",
+  "version": "2.0.0",
   "description": "Non-fungible token standard implementation for the Ethereum blockchain.",
   "scripts": {
     "compile": "specron compile",
@@ -60,7 +60,7 @@
   "devDependencies": {
     "@specron/cli": "^0.5.1",
     "@specron/spec": "^0.5.1",
-    "solc": "^0.5.2",
+    "solc": "^0.5.6",
     "solhint": "^1.4.1",
     "ts-node": "^7.0.1",
     "typescript": "^3.2.2",

src/contracts/math/safe-math.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev Math operations with safety checks that throw on error. This contract is based on the 

src/contracts/mocks/nf-token-enumerable-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/tokens/nf-token-enumerable.sol";
 import "../ownership/ownable.sol";

src/contracts/mocks/nf-token-metadata-enumerable-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../tokens/nf-token-metadata.sol";
 import "../tokens/nf-token-enumerable.sol";

src/contracts/mocks/nf-token-metadata-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../tokens/nf-token-metadata.sol";
 import "../ownership/ownable.sol";

src/contracts/mocks/nf-token-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/tokens/nf-token.sol";
 import "../ownership/ownable.sol";

src/contracts/ownership/ownable.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev The contract has an owner address, and provides basic authorization control whitch

src/contracts/tokens/erc721-enumerable.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev Optional enumeration extension for ERC-721 non-fungible token standard.

src/contracts/tokens/erc721-metadata.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev Optional metadata extension for ERC-721 non-fungible token standard.

src/contracts/tokens/erc721-token-receiver.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev ERC-721 interface for accepting safe transfers. 

src/contracts/tokens/erc721.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev ERC-721 non-fungible token standard. 

src/contracts/tokens/nf-token-enumerable.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "./nf-token.sol";
 import "./erc721-enumerable.sol";

src/contracts/tokens/nf-token-metadata.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "./nf-token.sol";
 import "./erc721-metadata.sol";

src/contracts/tokens/nf-token.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "./erc721.sol";
 import "./erc721-token-receiver.sol";

src/contracts/utils/address-utils.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev Utility library of inline functions on addresses.

src/contracts/utils/erc165.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 /**
  * @dev A standard for detecting smart contract interfaces. 

src/contracts/utils/supports-interface.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "./erc165.sol";
 

src/tests/mocks/nf-token-enumerable-test-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/mocks/nf-token-enumerable-mock.sol";
 

src/tests/mocks/nf-token-metadata-test-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/mocks/nf-token-metadata-mock.sol";
 

src/tests/mocks/nf-token-receiver-test-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/tokens/erc721-token-receiver.sol";
 

src/tests/mocks/nf-token-test-mock.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.5.2;
+pragma solidity 0.5.6;
 
 import "../../contracts/mocks/nf-token-mock.sol";