Uplift to Angular 9

Change-Id: I39713145975ba0e047ecf82960c2c292cc580467
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
Issue-ID: NONRTRIC-446
diff --git a/webapp-frontend/tsconfig.json b/webapp-frontend/tsconfig.json
index a94b5b6..5a33131 100644
--- a/webapp-frontend/tsconfig.json
+++ b/webapp-frontend/tsconfig.json
@@ -12,7 +12,7 @@
     "experimentalDecorators": true,
     "importHelpers": true,
     "resolveJsonModule": true,
-    "target": "es5",
+    "target": "es2015",
     "typeRoots": [
       "node_modules/@types"
     ],