build: update @angular/language-service to version ^6.0.0

Author: renovate-bot

package.json

@@ -15,24 +15,24 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/common": "^5.0.0",
-    "@angular/compiler": "^5.0.0",
-    "@angular/core": "^5.0.0",
-    "@angular/forms": "^5.0.0",
-    "@angular/http": "^5.0.0",
-    "@angular/platform-browser": "^5.0.0",
-    "@angular/platform-browser-dynamic": "^5.0.0",
-    "@angular/router": "^5.0.0",
+    "@angular/common": "^6.0.0",
+    "@angular/compiler": "^6.0.0",
+    "@angular/core": "^6.0.0",
+    "@angular/forms": "^6.0.0",
+    "@angular/http": "^6.0.0",
+    "@angular/platform-browser": "^6.0.0",
+    "@angular/platform-browser-dynamic": "^6.0.0",
+    "@angular/router": "^6.0.0",
     "core-js": "^2.4.1",
     "milligram": "^1.3.0",
     "normalize.css": "^8.0.0",
     "rxjs": "^5.4.2",
     "zone.js": "^0.8.14"
   },
   "devDependencies": {
-    "@angular/cli": "~1.7.0",
-    "@angular/compiler-cli": "^5.0.0",
-    "@angular/language-service": "^5.0.0",
+    "@angular/cli": "~6.0.0",
+    "@angular/compiler-cli": "^6.0.0",
+    "@angular/language-service": "^6.0.0",
     "@types/jasmine": "~2.8.1",
     "@types/node": "~9.6.0",
     "codelyzer": "~4.3.0",