4.0.0-rc.0

contracts/package.json

 {
   "name": "@openzeppelin/contracts",
   "description": "Secure Smart Contract library for Solidity",
-  "version": "4.0.0-beta.1",
+  "version": "4.0.0-rc.0",
   "files": [
     "**/*.sol",
     "/build/contracts/*.json",

package-lock.json

 {
   "name": "openzeppelin-solidity",
-  "version": "4.0.0-beta.1",
+  "version": "4.0.0-rc.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {

package.json

 {
   "name": "openzeppelin-solidity",
   "description": "Secure Smart Contract library for Solidity",
-  "version": "4.0.0-beta.1",
+  "version": "4.0.0-rc.0",
   "files": [
     "/contracts/**/*.sol",
     "/build/contracts/*.json",