Add tests for #16857 (#16940)

* Add tests for #16857

* Update comment

tests/integration/cli/config/external-config/esm-package-with-tla/index.js

@@ -0,0 +1 @@
+console.log("should have no semi");

tests/integration/cli/config/external-config/esm-package-with-tla/node_modules/@company/prettier-config/index.js

@@ -0,0 +1,4 @@
+export default await Promise.resolve({
+  "printWidth": await Promise.resolve(77),
+  "semi": await Promise.resolve(false)
+})

tests/integration/cli/config/external-config/esm-package-with-tla/node_modules/@company/prettier-config/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@company/prettier-config",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "exports": "./index.js"
+}

tests/integration/cli/config/external-config/esm-package-with-tla/package.json

@@ -0,0 +1,3 @@
+{
+  "prettier": "@company/prettier-config"
+}