chore: bump versions, preparing v0.6.0

Author: JohannesHoppe

src/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-cli-ghpages",
-  "version": "0.6.0-rc.2",
+  "version": "0.6.0",
   "description": "Deployment from the Angular CLI to GitHub pages (or any other branch on any other remote)",
   "main": "index.js",
   "bin": {
@@ -46,9 +46,9 @@
   },
   "homepage": "https://github.com/angular-schule/angular-cli-ghpages/#readme",
   "devDependencies": {
-    "@angular-devkit/architect": "^0.803.0-next.0",
-    "@angular-devkit/core": "^8.3.0-next.0",
-    "@angular-devkit/schematics": "^8.3.0-next.0",
+    "@angular-devkit/architect": "^0.803.0",
+    "@angular-devkit/core": "^8.3.0",
+    "@angular-devkit/schematics": "^8.3.0",
     "@types/fs-extra": "^8.0.0",
     "@types/jest": "^24.0.16",
     "@types/node": "^12.6.9",