FIX update version of typescript

package.json

@@ -46,7 +46,7 @@
     "pdfjs-dist": "^2.0.943",
     "rxjs": "^6.0.0",
     "simple-pdf-viewer": "^2.0.2",
-    "typescript": "^3.1.3",
+    "typescript": "^3.2.4",
     "zone.js": "~0.8.26"
   },
   "devDependencies": {