release: cut the 4.0.0-rc.4 release

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-srcs",
-  "version": "4.0.0-rc.3",
+  "version": "4.0.0-rc.4",
   "private": true,
   "branchPattern": "2.0.*",
   "description": "Angular - a web framework for modern web apps",

tools/@angular/tsc-wrapped/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@angular/tsc-wrapped",
-  "version": "4.0.0-rc.2",
+  "version": "4.0.0-rc.4",
   "description": "Wraps the tsc CLI, allowing extensions.",
   "homepage": "https://github.com/angular/angular/tree/master/tools/tsc-wrapped",
   "bugs": "https://github.com/angular/angular/issues",