useContext hook not working with shallow

The `useContext` hook does not work with `shallow` rendering and passing in `context`. Are there any workarounds for now?

### Current behavior
The value returned by `useContext` in a function component appears to be empty when using `shallow` and passing in a `context` argument. (The same problem also occurs when wrapping the component in the appropriate context Provider directly and then calling `.dive()`).

Here is a minimal test case, also reproduced at https://codesandbox.io/s/nice-blackwell-yz7tn in the `index.spec.js` file.

```jsx
import React, { useContext } from "react";
import PropTypes from "prop-types";

import Enzyme, { shallow } from "enzyme";
import Adapter from "enzyme-adapter-react-16";

Enzyme.configure({ adapter: new Adapter() });

const MyContext = React.createContext({});

export const MyComponent = () => {
const { myVal } = useContext(MyContext);

return

;
};

it("renders the correct text", () => {
MyComponent.contextTypes = {
myVal: PropTypes.any
};
const wrapper = shallow(
,
{context: {myVal: 'foobar'}}
);
expect(wrapper.text()).toEqual("foobar"); // expected "foobar" received ""
});
```

### Expected behavior
The text in the example above is expected to be `"foobar"`, but it's actually `""`.
In general, the value returned from `useContext` appears to be undefined.

Note that using `mount` instead of `shallow` causes the test to pass.

Also note: the codesandbox above has a second file (`class.spec.js`) in which a hack is employed that makes the test pass, which uses the legacy `contextTypes`. But this only appears to work with classes and `this.context`, not with `useContext`.

### Your environment
enzyme 3.10.0
enzyme-adapter-react-16 1.14.0
react 16.8.6
react-dom 16.8.6

#### API

- [x] shallow
- [ ] mount
- [ ] render

#### Version

| library | version
| ------------------- | -------
| enzyme |
| react |
| react-dom |
| react-test-renderer |
| adapter (below) |

#### Adapter

- [x] enzyme-adapter-react-16
- [ ] enzyme-adapter-react-16.3
- [ ] enzyme-adapter-react-16.2
- [ ] enzyme-adapter-react-16.1
- [ ] enzyme-adapter-react-15
- [ ] enzyme-adapter-react-15.4
- [ ] enzyme-adapter-react-14
- [ ] enzyme-adapter-react-13
- [ ] enzyme-adapter-react-helper
- [ ] others ( )

Reproduce the minimal case from the issue in the `index.spec.js` example, comparing `shallow` with `mount` and the Provider/`dive()` variant. Use the `class.spec.js` workaround as a comparison point; the issue is done when `useContext` returns the supplied value during shallow rendering and the expected text is `foobar`.

Written by the indexing model from the issue text.