fix: downgrade angular build version

package.json

@@ -19,27 +19,28 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "8.0.0-beta.12",
-    "@angular/cdk": "8.0.0-beta.2",
-    "@angular/common": "8.0.0-beta.12",
-    "@angular/compiler": "8.0.0-beta.12",
-    "@angular/core": "8.0.0-beta.12",
-    "@angular/forms": "8.0.0-beta.12",
-    "@angular/material": "8.0.0-beta.2",
-    "@angular/platform-browser": "8.0.0-beta.12",
-    "@angular/platform-browser-dynamic": "8.0.0-beta.12",
-    "@angular/router": "8.0.0-beta.12",
+    "@angular/animations": "7.2.13",
+    "@angular/cdk": "7.3.7",
+    "@angular/common": "7.2.13",
+    "@angular/compiler": "7.2.13",
+    "@angular/core": "7.2.13",
+    "@angular/forms": "7.2.13",
+    "@angular/material": "7.3.7",
+    "@angular/platform-browser": "7.2.13",
+    "@angular/platform-browser-dynamic": "7.2.13",
+    "@angular/router": "7.2.13",
     "@ng-bootstrap/ng-bootstrap": "4.1.1",
     "@uirouter/angular": "3.0.0",
     "bootstrap": "4.3.1",
+    "core-js": "2.6.3",
     "rxjs": "6.4.0",
     "zone.js": "0.9.0"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "0.800.0-beta.12",
-    "@angular/cli": "8.0.0-beta.12",
-    "@angular/compiler-cli": "8.0.0-beta.12",
-    "@angular/language-service": "8.0.0-beta.12",
+    "@angular-devkit/build-angular": "0.13.8",
+    "@angular/cli": "7.3.8",
+    "@angular/compiler-cli": "7.2.13",
+    "@angular/language-service": "7.2.13",
     "@types/applicationinsights-js": "1.0.9",
     "@types/facebook-pixel": "0.0.19",
     "@types/fs-extra": "5.0.5",
@@ -63,7 +64,7 @@
     "ts-node": "8.1.0",
     "tsickle": "0.34.3",
     "tslint": "5.15.0",
-    "typescript": "3.4.3"
+    "typescript": "3.2.4"
   },
   "release": {
     "branch": "master"