Add a test for reserved keywords used as import/export specifiers

test/form/samples/reserved-keywords-in-imports-exports/_config.js

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+module.exports = {
+	description: 'correctly handles reserved keywords in exports/imports',
+	options: {
+		input: ['main'],
+		output: {
+			name: 'reservedKeywords'
+		},
+		external: ['external']
+	}
+};

test/form/samples/reserved-keywords-in-imports-exports/_expected/amd.js

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+define(['exports', 'external'], (function (exports, external) { 'use strict';
+
+	function _interopNamespaceDefault(e) {
+		var n = Object.create(null);
+		if (e) {
+			Object.keys(e).forEach(function (k) {
+				if (k !== 'default') {
+					var d = Object.getOwnPropertyDescriptor(e, k);
+					Object.defineProperty(n, k, d.get ? d : {
+						enumerable: true,
+						get: function () { return e[k]; }
+					});
+				}
+			});
+		}
+		n.default = e;
+		return Object.freeze(n);
+	}
+
+	var external__namespace = /*#__PURE__*/_interopNamespaceDefault(external);
+
+	console.log(external.finally, external.catch); // retain those local bindings
+
+	const legal = 10;
+
+	Object.defineProperty(exports, 'const', {
+		enumerable: true,
+		get: function () { return external.const; }
+	});
+	Object.defineProperty(exports, 'in', {
+		enumerable: true,
+		get: function () { return external.for; }
+	});
+	Object.defineProperty(exports, 'return', {
+		enumerable: true,
+		get: function () { return external.bar; }
+	});
+	exports.yield = external__namespace;
+	exports.await = legal;
+
+}));

test/form/samples/reserved-keywords-in-imports-exports/_expected/cjs.js

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+'use strict';
+
+var external = require('external');
+
+function _interopNamespaceDefault(e) {
+	var n = Object.create(null);
+	if (e) {
+		Object.keys(e).forEach(function (k) {
+			if (k !== 'default') {
+				var d = Object.getOwnPropertyDescriptor(e, k);
+				Object.defineProperty(n, k, d.get ? d : {
+					enumerable: true,
+					get: function () { return e[k]; }
+				});
+			}
+		});
+	}
+	n.default = e;
+	return Object.freeze(n);
+}
+
+var external__namespace = /*#__PURE__*/_interopNamespaceDefault(external);
+
+console.log(external.finally, external.catch); // retain those local bindings
+
+const legal = 10;
+
+Object.defineProperty(exports, 'const', {
+	enumerable: true,
+	get: function () { return external.const; }
+});
+Object.defineProperty(exports, 'in', {
+	enumerable: true,
+	get: function () { return external.for; }
+});
+Object.defineProperty(exports, 'return', {
+	enumerable: true,
+	get: function () { return external.bar; }
+});
+exports.yield = external__namespace;
+exports.await = legal;

test/form/samples/reserved-keywords-in-imports-exports/_expected/es.js

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+import { finally as finally$1, catch as catch$1 } from 'external';
+import * as external from 'external';
+export { external as yield };
+export { const, for as in, bar as return } from 'external';
+
+console.log(finally$1, catch$1); // retain those local bindings
+
+const legal = 10;
+
+export { legal as await };

test/form/samples/reserved-keywords-in-imports-exports/_expected/iife.js

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+var reservedKeywords = (function (exports, external) {
+	'use strict';
+
+	function _interopNamespaceDefault(e) {
+		var n = Object.create(null);
+		if (e) {
+			Object.keys(e).forEach(function (k) {
+				if (k !== 'default') {
+					var d = Object.getOwnPropertyDescriptor(e, k);
+					Object.defineProperty(n, k, d.get ? d : {
+						enumerable: true,
+						get: function () { return e[k]; }
+					});
+				}
+			});
+		}
+		n.default = e;
+		return Object.freeze(n);
+	}
+
+	var external__namespace = /*#__PURE__*/_interopNamespaceDefault(external);
+
+	console.log(external.finally, external.catch); // retain those local bindings
+
+	const legal = 10;
+
+	Object.defineProperty(exports, 'const', {
+		enumerable: true,
+		get: function () { return external.const; }
+	});
+	Object.defineProperty(exports, 'in', {
+		enumerable: true,
+		get: function () { return external.for; }
+	});
+	Object.defineProperty(exports, 'return', {
+		enumerable: true,
+		get: function () { return external.bar; }
+	});
+	exports.yield = external__namespace;
+	exports.await = legal;
+
+	return exports;
+
+})({}, external);

test/form/samples/reserved-keywords-in-imports-exports/_expected/system.js

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+System.register('reservedKeywords', ['external'], (function (exports) {
+	'use strict';
+	var finally$1, catch$1;
+	return {
+		setters: [function (module) {
+			finally$1 = module.finally;
+			catch$1 = module.catch;
+			exports({ const: module.const, in: module.for, return: module.bar, yield: module });
+		}],
+		execute: (function () {
+
+			console.log(finally$1, catch$1); // retain those local bindings
+
+			const legal = exports('await', 10);
+
+		})
+	};
+}));

test/form/samples/reserved-keywords-in-imports-exports/_expected/umd.js

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+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('external')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'external'], factory) :
+	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.reservedKeywords = {}, global.external));
+})(this, (function (exports, external) { 'use strict';
+
+	function _interopNamespaceDefault(e) {
+		var n = Object.create(null);
+		if (e) {
+			Object.keys(e).forEach(function (k) {
+				if (k !== 'default') {
+					var d = Object.getOwnPropertyDescriptor(e, k);
+					Object.defineProperty(n, k, d.get ? d : {
+						enumerable: true,
+						get: function () { return e[k]; }
+					});
+				}
+			});
+		}
+		n.default = e;
+		return Object.freeze(n);
+	}
+
+	var external__namespace = /*#__PURE__*/_interopNamespaceDefault(external);
+
+	console.log(external.finally, external.catch); // retain those local bindings
+
+	const legal = 10;
+
+	Object.defineProperty(exports, 'const', {
+		enumerable: true,
+		get: function () { return external.const; }
+	});
+	Object.defineProperty(exports, 'in', {
+		enumerable: true,
+		get: function () { return external.for; }
+	});
+	Object.defineProperty(exports, 'return', {
+		enumerable: true,
+		get: function () { return external.bar; }
+	});
+	exports.yield = external__namespace;
+	exports.await = legal;
+
+}));

test/form/samples/reserved-keywords-in-imports-exports/main.js

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+import { finally as baz, catch as bazinga } from 'external';
+console.log(baz, bazinga); // retain those local bindings
+
+const legal = 10;
+
+export { legal as await };
+
+export { bar as return, const, for as in } from 'external';
+
+import * as lib from 'external';
+export { lib as yield };