Complie with warring

### Issue type

**I'm submitting a ...** (check one with "x")

* [ X ] bug report
* [ ] feature request
* [ ] question about the decisions made in the repository

### Issue description
I clone the code of branch starter-kit and run npm i, when I type 'npm start' to start the server, the compiling will stuck at 69% with below warring informations:
`WARNING in ./node_modules/@angular/core/fesm5/core.js 18359:15-36
Critical dependency: the request of a dependency is an expression

WARNING in ./node_modules/@angular/core/fesm5/core.js 18371:15-102
Critical dependency: the request of a dependency is an expression
ℹ ｢wdm｣: Compiled with warnings.`

### Other information:

**npm, node, OS, Browser**
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