Include all TypeScript @types listed in project dependency

Fixes vector-im/element-web#17743

The package @types/jest was not discovered because if types is specified, only packages listed will be included in the global scope.

tsconfig.json

@@ -9,12 +9,10 @@
     "noImplicitAny": false,
     "sourceMap": true,
     "outDir": "./lib",
-    "declaration": true,
-    "types": [
-      "node"
-    ]
+    "declaration": true
   },
   "include": [
-    "./src/**/*.ts"
+    "./src/**/*.ts",
+    "./spec/**/*.ts",
   ]
 }