[no-unused-vars] false positive for imported types

[StrangeWill]

Repro

<script lang="ts">
// ...
import { AxiosError } from "axios";
// ...

const response = await this.$http
	.post<JwtToken>(
		"authentication_token",
		{
			email: this.username,
			password: this.password
		},
		{
			headers: {
				authorization: ""
			}
		}
	)
	.catch((error: AxiosError) => { // <-- this line right here
		if (error?.response?.status == 401) {
			throw "Login Failed";
		}

		throw error?.message;
	});
// ...

Expected Result

Should pass es-lint fine

Actual Result

It sometimes passes es-lint, appears to do it on first pass, but fails on subsequent passes when running npm run serve.

Additional Info

Versions

package	version
@typescript-eslint/eslint-plugin	2.18.0
@typescript-eslint/parser	2.18.0
TypeScript	3.7.5
ESLint	6.8.0
node	12.14.1
npm	6.13.6

[abraham]

Since TypeScript 2.9 you can work around this with import types.

.catch((error: import("axios").AxiosError) => {

[bradzacher]

Merging into #1856