test: add {#await} type test (#231)

Author: ota-meshi

tests/fixtures/integrations/type-info-tests/await-input.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+    let foo: Promise<()=>void>
+</script>
+
+{#await foo then bar}
+    <button on:click={() => bar()} />
+{/await}

tests/fixtures/integrations/type-info-tests/await-output.json

@@ -0,0 +1 @@
+[]

tests/fixtures/integrations/type-info-tests/await-setup.ts

@@ -0,0 +1,24 @@
+/* eslint eslint-comments/require-description: 0, @typescript-eslint/explicit-module-boundary-types: 0 */
+import type { Linter } from "eslint";
+import { BASIC_PARSER_OPTIONS } from "../../../src/parser/test-utils";
+import { rules } from "@typescript-eslint/eslint-plugin";
+export function setupLinter(linter: Linter) {
+  linter.defineRule(
+    "@typescript-eslint/no-unsafe-call",
+    rules["no-unsafe-call"] as never
+  );
+}
+
+export function getConfig() {
+  return {
+    parser: "svelte-eslint-parser",
+    parserOptions: BASIC_PARSER_OPTIONS,
+    rules: {
+      "@typescript-eslint/no-unsafe-call": "error",
+    },
+    env: {
+      browser: true,
+      es2021: true,
+    },
+  };
+}