Immutability check reducer is not compatible with IE11

[jonr-elsewhen]

Minimal reproduction of the bug/regression with instructions:

Can't include a repro as StackBlitz does not work in IE11.

Trying to run an app that uses NgRx in 11 in non-prod mode produces the following error:

ERROR TypeError: Accessing the 'caller' property of a function or arguments object is not allowed in strict mode

It occurs here:

platform/modules/store/src/meta-reducers/immutability_reducer.ts

Line 23 in c59c211

const propValue = target[prop];

Seems to be the same issue as this: https://github.com/substack/deep-freeze/issues/6

Expected behavior:

Using NgRx in dev mode in IE11 should work.

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s):

Angular 8
NgRx 8
Internet Explorer 11

Other information:

I would be willing to submit a PR to fix this issue

[x] Yes (Assistance is provided if you need help submitting a pull request)
[ ] No

[timdeschryver]

Can you reproduce it with the ngrx example-app located in this project?
If I open up the example app, I can't reproduce this behavior.

[jonr-elsewhen]

The underlying issue was that one of the objects in our store had a function property. You can reproduce it in the example app by adding a function to the initial state of some some reducer.

See the PR I submitted for more info. This bug also showed up in ngrx-store-freeze: brandonroberts/ngrx-store-freeze#7