Update dependency rxjs to v6

basic/package.json

@@ -28,7 +28,7 @@
     "core-js": "2.5.7",
     "graphql-config-parser": "1.2.1",
     "graphql-tag": "1.3.2",
-    "rxjs": "5.5.12",
+    "rxjs": "6.3.3",
     "ts-helpers": "1.1.2",
     "zone.js": "0.8.26"
   },

basic/yarn.lock

@@ -4534,11 +4534,11 @@ run-queue@^1.0.0, run-queue@^1.0.3:
   dependencies:
     aproba "^1.1.1"
 
-rxjs@5.5.12:
-  version "5.5.12"
-  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-5.5.12.tgz#6fa61b8a77c3d793dbaf270bee2f43f652d741cc"
+rxjs@6.3.3:
+  version "6.3.3"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.3.3.tgz#3c6a7fa420e844a81390fb1158a9ec614f4bad55"
   dependencies:
-    symbol-observable "1.0.1"
+    tslib "^1.9.0"
 
 rxjs@^5.5.6:
   version "5.5.6"
@@ -5235,6 +5235,10 @@ tslib@^1.7.1:
   version "1.8.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.8.1.tgz#6946af2d1d651a7b1863b531d6e5afa41aa44eac"
 
+tslib@^1.9.0:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
+
 [email protected]:
   version "4.5.1"
   resolved "https://registry.yarnpkg.com/tslint/-/tslint-4.5.1.tgz#05356871bef23a434906734006fc188336ba824b"