build: update dependencies

Update dependencies and configure the app for angular material and flex
layout.

Fixes #44

src/app/about/about-routing.module.ts

@@ -1,7 +1,7 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
-import { Route, extract } from '@app/core';
+import { Route, extract } from '../../app/core';
 import { AboutComponent } from './about.component';
 
 const routes: Routes = [

src/app/about/about.component.ts

@@ -1,6 +1,6 @@
 import { Component, OnInit } from '@angular/core';
 
-import { environment } from '@env/environment';
+import { environment } from '../../environments/environment';
 
 @Component({
   selector: 'app-about',