update tests

test/css/samples/empty-class/_config.js

@@ -3,6 +3,7 @@ export default {
 
 	warnings: [{
 		filename: "SvelteComponent.html",
+		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		loc: {
 			line: 4,

test/css/samples/omit-scoping-attribute-descendant/_config.js

@@ -2,6 +2,7 @@ export default {
 	cascade: false,
 
 	warnings: [{
+		code: `css-unused-selector`,
 		message: 'Unused CSS selector',
 		loc: {
 			line: 8,

test/css/samples/refs-qualified/_config.js

@@ -6,6 +6,7 @@ export default {
 	},
 
 	warnings: [{
+		code: `css-unused-selector`,
 		message: 'Unused CSS selector',
 		loc: {
 			column: 1,

test/css/samples/refs/_config.js

@@ -2,6 +2,7 @@ export default {
 	cascade: false,
 
 	warnings: [{
+		code: `css-unused-selector`,
 		message: 'Unused CSS selector',
 		loc: {
 			column: 1,

test/css/samples/unused-selector-leading/_config.js

@@ -4,6 +4,7 @@ export default {
 	warnings: [
 		{
 			filename: "SvelteComponent.html",
+			code: `css-unused-selector`,
 			message: "Unused CSS selector",
 			loc: {
 				line: 4,
@@ -21,6 +22,7 @@ export default {
 
 		{
 			filename: "SvelteComponent.html",
+			code: `css-unused-selector`,
 			message: "Unused CSS selector",
 			loc: {
 				line: 4,

test/css/samples/unused-selector-ternary/_config.js

@@ -7,6 +7,7 @@ export default {
 
 	warnings: [{
 		filename: "SvelteComponent.html",
+		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		loc: {
 			line: 12,

test/css/samples/unused-selector/_config.js

@@ -3,6 +3,7 @@ export default {
 
 	warnings: [{
 		filename: "SvelteComponent.html",
+		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		loc: {
 			line: 8,

test/formats/index.js

@@ -184,6 +184,7 @@ describe("formats", () => {
 			);
 
 			assert.deepEqual(warnings, [{
+				code: `options-missing-globals`,
 				message: `No name was supplied for imported module 'lodash'. Guessing '_', but you should use options.globals`
 			}]);
 		});