build: include rxjs dependency needed for bazel local repo

Author: filipesilva

package.json

@@ -91,6 +91,7 @@
     "license-checker": "^20.1.0",
     "minimatch": "^3.0.4",
     "minimist": "^1.2.0",
+    "rxjs": "^6.0.0",
     "semver": "^5.3.0",
     "source-map": "^0.5.6",
     "source-map-support": "^0.5.0",

packages/angular_devkit/core/BUILD

@@ -9,7 +9,6 @@ load("@build_bazel_rules_nodejs//:defs.bzl", "jasmine_node_test")
 
 licenses(["notice"])  # MIT License
 
-
 # @angular-devkit/core
 
 ts_library(