prevent-abbreviations fixer bug on global variable

[fisker]

found this duration #444 , it's in our test

eslint-plugin-unicorn/test/prevent-abbreviations.js

Lines 974 to 988 in a496e96

	{
	code: outdent`
	function unicorn(unicorn) {
	const {prop = {}} = unicorn;
	return property;
	}
	`,
	output: outdent`
	function unicorn(unicorn) {
	const {prop: property = {}} = unicorn;
	return property;
	}
	`,
	errors: createErrors()
	},

but, property in first one could be a global variable.

--- FYI: I've checked this code bellow is right

const property = 'outer';
function unicorn(unicorn) {
	const {prop = {}} = unicorn;
	return property;
}

fix to

const property = 'outer';
function unicorn(unicorn) {
	const {prop: property_ = {}} = unicorn;
	return property;
}