build(docs-infra): update @angular/cli to 9.0.0-next.8

The payload size increase in the ES5 bundles is (at least partially)
expected, due to fixing some down-leveling corner cases.

Related CLI issue: angular/angular-cli#15673

Author: gkalpak

aio/package.json

@@ -102,8 +102,8 @@
     "zone.js": "~0.10.2"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.900.0-next.6",
-    "@angular/cli": "9.0.0-next.6",
+    "@angular-devkit/build-angular": "~0.900.0-next.8",
+    "@angular/cli": "9.0.0-next.8",
     "@angular/compiler-cli": "^9.0.0-next.9",
     "@angular/language-service": "^9.0.0-next.9",
     "@types/jasmine": "^3.4.2",
@@ -176,4 +176,4 @@
     "//terser-workaround": "Remove once [email protected] is released (with a fix).",
     "@angular-devkit/build-angular/**/terser": "4.3.2"
   }
-}
+}

aio/scripts/_payload-limits.json

@@ -2,36 +2,36 @@
   "aio": {
     "master": {
       "uncompressed": {
-        "runtime-es5": 2990,
-        "runtime-es2015": 2996,
-        "main-es5": 502599,
-        "main-es2015": 458172,
-        "polyfills-es5": 142383,
-        "polyfills-es2015": 52608
+        "runtime-es5": 2981,
+        "runtime-es2015": 2987,
+        "main-es5": 541840,
+        "main-es2015": 457135,
+        "polyfills-es5": 143165,
+        "polyfills-es2015": 52503
       }
     }
   },
   "aio-local": {
     "master": {
       "uncompressed": {
-        "runtime-es5": 2990,
-        "runtime-es2015": 2996,
-        "main-es5": 505956,
-        "main-es2015": 461542,
-        "polyfills-es5": 142383,
-        "polyfills-es2015": 52608
+        "runtime-es5": 2981,
+        "runtime-es2015": 2987,
+        "main-es5": 545197,
+        "main-es2015": 460505,
+        "polyfills-es5": 143165,
+        "polyfills-es2015": 52503
       }
     }
   },
   "aio-local-viewengine": {
     "master": {
       "uncompressed": {
-        "runtime-es5": 3100,
-        "runtime-es2015": 3106,
-        "main-es5": 483984,
-        "main-es2015": 438821,
-        "polyfills-es5": 142383,
-        "polyfills-es2015": 52608
+        "runtime-es5": 3091,
+        "runtime-es2015": 3097,
+        "main-es5": 522775,
+        "main-es2015": 437775,
+        "polyfills-es5": 143165,
+        "polyfills-es2015": 52503
       }
     }
   }