feat: added support webpackIgnore comment

Author: cap-Bernardito

test/fixtures/webpackIgnore.html

@@ -0,0 +1,8 @@
+<img src="image.png" />
+<!-- webpackIgnore: true -->
+<img src="image.png" />
+<!-- webpackIgnore: true --> <img src="image.png" />
+<img srcset="image.png 480w 2x broken" src="image.png" alt="Elva dressed as a fairy">
+<!-- webpackIgnore: true -->
+<img srcset="image.png 480w 2x broken" src="image.png" alt="Elva dressed as a fairy">
+

test/fixtures/webpackIgnore.js

@@ -0,0 +1,3 @@
+import html from './webpackIgnore.html';
+
+export default html;

test/loader.test.js

@@ -190,4 +190,16 @@ describe('loader', () => {
     expect(getWarnings(stats)).toMatchSnapshot('warnings');
     expect(getErrors(stats)).toMatchSnapshot('errors');
   });
+
+  // it.only('should work with webpackIgnore comment', async () => {
+  //   const compiler = getCompiler('webpackIgnore.js');
+  //   const stats = await compile(compiler);
+  //
+  //   expect(getModuleSource('./webpackIgnore.html', stats)).toMatchSnapshot('module');
+  //   expect(
+  //     execute(readAsset('main.bundle.js', compiler, stats))
+  //   ).toMatchSnapshot('result');
+  //   expect(getWarnings(stats)).toMatchSnapshot('warnings');
+  //   expect(getErrors(stats)).toMatchSnapshot('errors');
+  // });
 });