Bump openzeppelin-solidity from 3.4.1 to 4.0.0

Bumps [openzeppelin-solidity](https://github.com/OpenZeppelin/openzeppelin-contracts) from 3.4.1 to 4.0.0.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-contracts/commits/v4.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -12,7 +12,7 @@
 		"eslint": "^7.13.0",
 		"ganache-core": "^2.13.2",
 		"jquery": "3.6.0",
-		"openzeppelin-solidity": "3.4.1",
+		"openzeppelin-solidity": "4.0.0",
 		"solidity-coverage": "^0.7.16",
 		"truffle-assertions": "^0.9.1",
 		"truffle-contract": "4.0.31",