Migration to v5.1.0 from v4.2.0

### Issue type

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

* [ x ] bug report
* [ ] feature request

### Issue description

Is there a migration guide from v4.2.0 -> v5.1.0 (similar to what exists from 3.5 -> 4.0)?

**Angular, Nebular**
```
"dependencies": {
"@agm/core": "^1.1.0",
"@angular/animations": "^8.2.14",
"@angular/cdk": "^8.2.3",
"@angular/common": "^8.2.14",
"@angular/compiler": "^8.2.14",
"@angular/core": "^8.2.14",
"@angular/forms": "^8.2.14",
"@angular/material": "^8.2.3",
"@angular/platform-browser": "^8.2.14",
"@angular/platform-browser-dynamic": "^8.2.14",
"@angular/router": "^8.2.14",
"@asymmetrik/ngx-leaflet": "3.0.1",
"@google-cloud/firestore": "^2.6.0",
"@nebular/auth": "4.2.0",
"@nebular/bootstrap": "4.2.0",
"@nebular/eva-icons": "4.2.0",
"@nebular/security": "4.2.0",
"@nebular/theme": "4.2.0",
"@ngu/carousel": "^1.5.5",
"@ngx-gallery/core": "^5.0.0-beta.0",
"@ngx-gallery/lightbox": "^5.0.0-beta.0",
"@swimlane/ngx-charts": "^10.1.0",
"@thisissoon/angular-inviewport": "^4.2.0",
"@thisissoon/angular-scrollspy": "^2.2.0",
"@types/hammerjs": "^2.0.36",
"@types/papaparse": "^5.0.3",
"@types/string-similarity": "^3.0.0",
"angular-tree-component": "7.2.0",
"angular2-carousel": "^1.0.17",
"angular2-chartjs": "^0.4.1",
"angular2-toaster": "^7.0.0",
"angularfire2": "^5.2.3",
"aws-sdk": "^2.585.0",
"body-parser": "^1.19.0",
"bootstrap": "4.3.1",
"chart.js": "^2.9.3",
"chartjs-chart-box-and-violin-plot": "^2.2.0",
"chartjs-plugin-annotation": "^0.5.7",
"ckeditor": "4.7.3",
"classlist.js": "1.1.20150312",
"core-js": "2.5.1",
"cors": "^2.8.5",
"echarts": "^4.5.0",
"eva-icons": "^1.1.2",
"export-to-csv": "^0.2.1",
"express": "^4.17.1",
"firebase": "^6.6.2",
"guid-typescript": "^1.0.9",
"hammerjs": "^2.0.8",
"intersection-observer": "^0.7.0",
"intl": "1.2.5",
"ionicons": "2.0.1",
"jquery": "^3.4.1",
"jsonwebtoken": "^8.5.1",
"leaflet": "1.2.0",
"mapbox-gl": "^1.6.0",
"moving-averages": "^4.0.5",
"nebular-icons": "1.1.0",
"ng2-charts": "^2.3.0",
"ng2-ckeditor": "^1.2.6",
"ng2-completer": "2.0.8",
"ng2-dragula": "^2.1.1",
"ng2-smart-table": "1.3.5",
"ng2-tooltip-directive": "^2.8.17",
"ngx-echarts": "^4.2.2",
"ngx-owl-carousel": "^2.0.7",
"ngx-toastr": "^11.3.2",
"node-sass": "^4.13.0",
"normalize.css": "6.0.0",
"pace-js": "1.0.2",
"papaparse": "^5.1.0",
"path": "^0.12.7",
"popper.js": "^1.16.0",
"roboto-fontface": "0.8.0",
"rxjs": "6.5.2",
"rxjs-compat": "6.3.0",
"socicon": "3.0.5",
"string-similarity": "^3.0.0",
"tinymce": "4.5.7",
"tslib": "^1.10.0",
"typeface-exo": "0.0.22",
"web-animations-js": "github:angular/web-animations-js#release_pr208",
"zone.js": "~0.9.1"
},
```