Fix missing readable-stream types (#982)

* fix missing readable-stream types

* move to normal dependencies

Author: IceTank

package.json

@@ -44,6 +44,7 @@
     "standard": "^16.0.1"
   },
   "dependencies": {
+    "@types/readable-stream": "^2.3.13",
     "aes-js": "^3.1.2",
     "buffer-equal": "^1.0.0",
     "debug": "^4.3.2",