🔧 don't try to build ES5

It was not supported anyways

tsconfig.app.json

@@ -3,7 +3,6 @@
   "compilerOptions": {
     "outDir": "./out-tsc/app",
     "skipLibCheck": true,
-    "target": "ES5",
     "types": ["node"],
   },
   "files": [

tsconfig.json

@@ -21,7 +21,7 @@
       "ol/*": ["node_modules/ol/*"],
       "hslayers-ng/*": ["node_modules/hslayers/*"],
       "@ngx-translate/*": ["node_modules/@ngx-translate/*"],
-      "cesium/*": ["node_modules/cesium/*"],
+      "cesium/*": ["node_modules/cesium/*"]
     }
   },
   "angularCompilerOptions": {