Upgrade to nebular 5 beta, remove "angular-tree-component" package

package.json

@@ -26,7 +26,8 @@
     "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"
+    "release:changelog": "npm run conventional-changelog -- -p angular -i CHANGELOG.md -s",
+    "postinstall": "ngcc --properties es2015 es5 browser module main --first-only --create-ivy-entry-points"
   },
   "dependencies": {
     "@agm/core": "^1.0.0-beta.5",
@@ -40,12 +41,11 @@
     "@angular/platform-browser-dynamic": "^9.0.4",
     "@angular/router": "^9.0.4",
     "@asymmetrik/ngx-leaflet": "3.0.1",
-    "@nebular/auth": "4.4.0",
-    "@nebular/eva-icons": "4.4.0",
-    "@nebular/security": "4.4.0",
-    "@nebular/theme": "4.4.0",
-    "@swimlane/ngx-charts": "^10.0.0",
-    "angular-tree-component": "7.2.0",
+    "@nebular/auth": "5.0.0-beta.8",
+    "@nebular/eva-icons": "5.0.0-beta.8",
+    "@nebular/security": "5.0.0-beta.8",
+    "@nebular/theme": "5.0.0-beta.8",
+    "@swimlane/ngx-charts": "^13.0.2",
     "angular2-chartjs": "0.4.1",
     "angular2-toaster": "^7.0.0",
     "bootstrap": "4.3.1",
@@ -60,9 +60,9 @@
     "leaflet": "1.2.0",
     "nebular-icons": "1.1.0",
     "ng2-ckeditor": "^1.2.2",
-    "ng2-completer": "2.0.8",
-    "ng2-smart-table": "1.3.5",
-    "ngx-echarts": "^4.0.1",
+    "ng2-completer": "3.0.3",
+    "ng2-smart-table": "1.5.0",
+    "ngx-echarts": "^4.2.2",
     "node-sass": "^4.12.0",
     "normalize.css": "6.0.0",
     "pace-js": "1.0.2",
@@ -70,6 +70,7 @@
     "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",