Updates

-Removed unread messages while connecting
-Added KeyedDB integration
-pdf mimetype fix + mimetype can be string now

tsconfig.json

@@ -9,7 +9,8 @@
     "noImplicitThis": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
-    "declaration": true
+    "declaration": true,
+    "lib": ["es2019", "esnext.array"]
   },
   "include": ["src/*/*.ts"],
   "exclude": ["node_modules", "src/*/Tests.ts"]