Failing test for backtick quotes

Issue #1782

test/quotes.js

@@ -0,0 +1,20 @@
+var browserify = require('../');
+var vm = require('vm');
+var test = require('tap').test;
+
+test('quotes', function (t) {
+    t.plan(3);
+
+    var b = browserify(__dirname + '/quotes/main.js');
+    b.bundle(function (err, src) {
+        var c = {
+            done : function (single, double, backtick) {
+                t.equal(single, 'success', 'single quotes');
+                t.equal(double, 'success', 'double quotes');
+                t.equal(backtick, 'success', 'backtick quotes');
+                t.end();
+            }
+        };
+        vm.runInNewContext(src, c);
+    });
+});

test/quotes/main.js

@@ -0,0 +1 @@
+done(require('./one.js'), require("./two.js"), require(`./three.js`));

test/quotes/one.js

@@ -0,0 +1 @@
+module.exports = 'success';

test/quotes/three.js

@@ -0,0 +1 @@
+module.exports = 'success';

test/quotes/two.js

@@ -0,0 +1 @@
+module.exports = 'success';