It appears that the repository has undergone several changes and renamings:

backend/node_modules/supports-preserve-symlinks-flag/test/index.js

@@ -1,29 +0,0 @@
-'use strict';
-
-var test = require('tape');
-var semver = require('semver');
-
-var supportsPreserveSymlinks = require('../');
-var browser = require('../browser');
-
-test('supportsPreserveSymlinks', function (t) {
-	t.equal(typeof supportsPreserveSymlinks, 'boolean', 'is a boolean');
-
-	t.equal(browser, null, 'browser file is `null`');
-	t.equal(
-		supportsPreserveSymlinks,
-		null,
-		'in a browser, is null',
-		{ skip: typeof window === 'undefined' }
-	);
-
-	var expected = semver.satisfies(process.version, '>= 6.2');
-	t.equal(
-		supportsPreserveSymlinks,
-		expected,
-		'is true in node v6.2+, false otherwise (actual: ' + supportsPreserveSymlinks + ', expected ' + expected + ')',
-		{ skip: typeof window !== 'undefined' }
-	);
-
-	t.end();
-});