starter-kit branch does not compile

### Issue type

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

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

### Issue description

**Current behavior:** code does not compile at all on branch **starter-kit**

**Expected behavior:**

**Steps to reproduce:**

just download fresh version of code and try to run it
**Related code:**

```
Failed to compile.

src/app/@core/utils/ripple.service.ts:2:37 - error TS2307: Cannot find module '@angular/material/core'.

2 import { RippleGlobalOptions } from '@angular/material/core';
~~~~~~~~~~~~~~~~~~~~~~~~
src/app/@theme/theme.module.ts:3:33 - error TS2307: Cannot find module '@angular/material/core'.

3 import { MatRippleModule } from '@angular/material/core';
```