Doesn't work with loose mode in Babel 7 beta

[insin]

Here's a cloneable repro Gist with config, input, and outputs, using @babel/* v7.0.0-beta.53 and babel-plugin-add-module-exports v0.3.1:

https://gist.github.com/insin/078533bae2d2e91ec94e90ff91e95593

I suspect the exports.__esModule = true; line in the loose version is triggering the hasExportsNamed check here:

babel-plugin-add-module-exports/src/index.js

Lines 76 to 84 in 4ea15e3

	const objectName = path.get(`${property}.left.object.name`).node
	const propertyName = path.get(`${property}.left.property.name`).node
	if (objectName === 'exports') {
	if (propertyName === 'default') {
	this.hasExportsDefault = true
	} else {
	this.hasExportsNamed = true
	}
	}

Should a special case be added for exports.__esModule?