import-index: Fix for require()

[garyking]

When using ESLint to lint code while typing, if you type require() with the import-index rule enabled, then it will throw an error.

This fixes that.

[fisker]

can you also check prevent-abbreviations?

[garyking]

I haven't noticed any issues with prevent-abbreviations and require(), so it doesn't seem like any changes need to be made to those rule, or its tests.

[fisker]

thanks