Usage with Typescript

[undsoft]

Hi, I've been trying to use the library in Typescript with no luck.

Since the library has no typings, I've declared my own module:
declare module 'mobx-delorean';

but when running I get this:

Uncaught TypeError: Cannot read property 'action' of undefined
    at eval (utils.js:82)
    at Object.../../../node_modules/mobx-delorean/lib/utils.js (main.js:10269)
    at __webpack_require__ (main.js:724)
    at fn (main.js:101)
    at eval (spy.js:14)
    at Object.../../../node_modules/mobx-delorean/lib/spy.js (main.js:10209)
    at __webpack_require__ (main.js:724)
    at fn (main.js:101)
    at eval (dev.js:11)
    at Object.../../../node_modules/mobx-delorean/lib/dev.js (main.js:10149)

Any suggestions on how I can make it work with Typescript?