Importing `jest/mock.js` causes tests to fail

[simon-abbott]

Describe the bug
After updating to 0.59.x our tests started failing with the error "Cannot find module './src/specs/NativeStripeSdkModule' from 'node_modules/@stripe/stripe-react-native/jest/mock.js'"

To Reproduce
Steps to reproduce the behavior:

1. Install @stripe/stripe-react-native v0.59.0 or later
2. Follow the Jest setup instructions
3. Run Jest

Expected behavior
The tests should work properly

Screenshots
N/A

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
This seems to be due to the jest.mock call introduced in 976e5f6. Changing the jest.mock call from ./src/specs/NativeStripeSdkModule to ../src/specs/NativeStripeSdkModule fixed the issue for me.