fix(ci): Use node 10 to fix the build (#2230)

Author: NothingEverHappens

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-- 'lts/*'
+  - "10"
 
 addons:
   chrome: stable
@@ -44,4 +44,4 @@ script:
     ./node_modules/.bin/karma start --single-run --browsers ChromeHeadlessTravis --reporters mocha &&
     yarn test:node &&
     node tools/run-typings-test.js &&
-    bash ./test/ng-build/build.sh
+    bash ./test/ng-build/build.sh