Suggestion diagnostics show in untyped JS code when regular diagnostics don't

[ghost]

TypeScript Version: 3.2.0-dev.20181011

Code

"".toUperKase();
const b = require("./b");

Expected behavior:

If we're not showing regular diagnostics, we should probably not show any suggestions either.

Actual behavior:

"".toUperKase() is fine. require is a real problem that we need to let the user know about right away!