fix(breaking): update TS type to match latest @types/jest

[rrufus]

Hi,

the Matchers type of definitelytyped's jest package have been updated: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/jest/index.d.ts#L667

This causes a compilation error since the interfaces don't match any more, e.g.

node_modules/snapshot-diff/index.d.ts:13:13 - error TS2428: All declarations of 'Matchers' must have identical type parameters.

13   interface Matchers<R> {
               ~~~~~~~~

There are several other similar examples e.g.
styled-components/jest-styled-components#270
testing-library/jest-dom#150

[thymikee]

I guess it isn't backwards compatible?

[rrufus]

You're right, but users will just need to update their version of @types/jest (as DefinitelyTyped, in keeping with the version of jest, did not increment the major version for this change).