"Import assignment cannot be used when targeting ECMAScript modules." should come with a codefix

**TypeScript Version:** 3.2.0-dev.20181030 **Code** **a.ts** ```ts import abs = require("abs"); ``` **tsconfig.json** ```ts { "compilerOptions": { "target": "esnext" } } ``` The error message is `Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.`. This indicates that we could provide a code fix. **Expected behavior:** There is a codefix that offers to change this to `import abs from "abs";`, or `import * as abs from "abs";`. If `--esModuleInterop` is set and the imported value is not used only as a namespace, we should prefer a default import. **Actual behavior:** No codefix.