Support the 8.0 rc

Author: jamesdaniels

package.json

@@ -34,14 +34,14 @@
   "homepage": "https://github.com/angular/angularfire2#readme",
   "dependencies": {
     "@angular-devkit/architect": "^0.800.0-rc.4 || >=8.0.0 <9 || 9.0.0-0",
-    "@angular-devkit/core": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular-devkit/schematics": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/common": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/compiler": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/core": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/platform-browser": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/platform-browser-dynamic": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/router": ">=6.0.0 <9 || 9.0.0-0",
+    "@angular-devkit/core": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular-devkit/schematics": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/common": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/compiler": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/core": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/platform-browser": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/platform-browser-dynamic": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/router": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
     "firebase": ">= 5.5.7 <7",
     "firebase-tools": "^6.10.0",
     "fuzzy": "^0.1.3",
@@ -57,9 +57,9 @@
     "utf-8-validate": "~4.0.0"
   },
   "devDependencies": {
-    "@angular/animations": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/compiler-cli": ">=6.0.0 <9 || 9.0.0-0",
-    "@angular/platform-server": ">=6.0.0 <9 || 9.0.0-0",
+    "@angular/animations": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/compiler-cli": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
+    "@angular/platform-server": ">=6.0.0 <9 || 8.0.0-0 || 9.0.0-0",
     "@types/inquirer": "^0.0.44",
     "@types/jasmine": "^2.5.36",
     "@types/request": "0.0.30",