Unable to migrate to version 5

### 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

**Current behavior:**
I am trying to migrate from ngx-admin 4 to 5. After making changes to packages.json I have compilation errors:
```
ERROR in src/app/app.module.ts:29:12 - error NG1010: Value at position 3 in the NgModule.imports of AppModule is not a reference: [object Object]

29 imports: [
~
30 BrowserAnimationsModule,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...
44 BrowserModule,
~~~~~~~~~~~~~~~~~~
45 ],
~~~
src/app/app.component.ts:11:14 - error NG8001: 'router-outlet' is not a known element:
1. If 'router-outlet' is an Angular component, then verify that it is part of this module.
2. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

11 template: '',

```
**Expected behavior:**
Application will start in dev mode properly withour errors

**Steps to reproduce:**
hopefully use my package.json and
ng start:dev

**Related code:**
packages.json:
```
{
"name": "mxw",
"version": "1.2.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"conventional-changelog": "conventional-changelog",
"start": "ng serve",
"start:dev": "ng serve",
"start:stage": "ng serve -- confiuration=stage",
"start:prod": "ng serve --configuration=prod",
"build": "ng build",
"build:prod": "npm run build -- --prod --aot --source-map=false",
"build:stage": "npm run build -- --configuration=stage --aot ",
"test": "ng test",
"test:coverage": "rimraf coverage && npm run test -- --code-coverage",
"lint": "ng lint",
"lint:fix": "ng lint ngx-admin-demo --fix",
"lint:styles": "stylelint ./src/**/*.scss",
"lint:ci": "npm run lint && npm run lint:styles",
"pree2e": "webdriver-manager update --standalone false --gecko false",
"e2e": "ng e2e",
"docs": "compodoc -p src/tsconfig.app.json -d docs",
"docs:serve": "compodoc -p src/tsconfig.app.json -d docs -s",
"prepush": "npm run lint:ci",
"release:changelog": "npm run conventional-changelog -- -p angular -i CHANGELOG.md -s"
},
"dependencies": {
"@akveo/ng2-completer": "^9.0.1",
"@angular/animations": "^9.0.4",
"@angular/cdk": "^9.1.2",
"@angular/common": "^9.0.4",
"@angular/compiler": "^9.0.4",
"@angular/core": "^9.0.4",
"@angular/forms": "^9.0.4",
"@angular/google-maps": "^9.1.0",
"@angular/platform-browser": "^9.0.4",
"@angular/platform-browser-dynamic": "^9.0.4",
"@angular/router": "^9.0.4",
"@asymmetrik/ngx-leaflet": "3.0.1",
"@nebular/auth": "5.0.0",
"@nebular/eva-icons": "5.0.0",
"@nebular/security": "5.0.0",
"@nebular/theme": "5.0.0",
"@swimlane/ngx-charts": "^13.0.2",
"@syncfusion/ej2-angular-dropdowns": "^18.1.42",
"@syncfusion/ej2-base": "^18.1.42",
"@syncfusion/ej2-data": "^18.1.42",
"@syncfusion/ej2-dropdowns": "^18.1.42",
"angular2-chartjs": "0.4.1",
"angular5-csv": "^0.2.11",
"bootstrap": "4.3.1",
"chart.js": "2.7.1",
"ckeditor": "4.7.3",
"classlist.js": "1.1.20150312",
"core-js": "2.5.1",
"echarts": "^4.0.2",
"eva-icons": "^1.1.3",
"intl": "1.2.5",
"ionicons": "2.0.1",
"leaflet": "1.2.0",
"nebular-icons": "1.1.0",
"ng2-ckeditor": "^1.2.2",
"ng2-smart-table": "^1.6.0",
"ngx-cookie-service": "^3.0.3",
"ngx-echarts": "^4.2.2",
"node-sass": "^4.12.0",
"normalize.css": "6.0.0",
"pace-js": "1.0.2",
"roboto-fontface": "0.8.0",
"rxjs": "6.5.4",
"rxjs-compat": "6.3.0",
"socicon": "3.0.5",
"style-loader": "^1.1.3",
"tinymce": "4.5.7",
"tslib": "^1.10.0",
"typeface-exo": "0.0.22",
"web-animations-js": "^2.3.2",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.900.4",
"@angular/cli": "^9.0.4",
"@angular/compiler-cli": "^9.0.4",
"@angular/language-service": "9.0.4",
"@compodoc/compodoc": "1.0.1",
"@fortawesome/fontawesome-free": "^5.2.0",
"@types/d3-color": "1.0.5",
"@types/googlemaps": "^3.39.3",
"@types/jasmine": "2.5.54",
"@types/jasminewd2": "2.0.3",
"@types/leaflet": "1.2.3",
"@types/node": "^12.11.1",
"codelyzer": "^5.1.2",
"conventional-changelog-cli": "1.3.4",
"husky": "0.13.3",
"jasmine-core": "2.6.4",
"jasmine-spec-reporter": "4.1.1",
"karma": "1.7.1",
"karma-chrome-launcher": "2.1.1",
"karma-cli": "1.0.1",
"karma-coverage-istanbul-reporter": "1.3.0",
"karma-jasmine": "1.1.0",
"karma-jasmine-html-reporter": "0.2.2",
"npm-run-all": "4.0.2",
"protractor": "5.1.2",
"rimraf": "2.6.1",
"stylelint": "7.13.0",
"ts-node": "3.2.2",
"tslint": "^5.7.0",
"tslint-language-service": "^0.9.9",
"typescript": "3.7.5"
}
```
}

### Other information:

**npm, node, OS, Browser**
```

```
node
```
node --version
v10.16.3

```
npm
```
npm --version
6.9.0
```