Update test case for new error message format

[22:26:42] w3c-html-validator spec/html/invalid.html fail (messages: 2)

Author: pilafmon

package.json

@@ -73,7 +73,7 @@
       "step:03": "eslint --max-warnings 0 . --ext .ts",
       "step:04": "tsc",
       "step:05": "tsc --module UMD --outDir build/umd",
-      "step:06": "cpy 'build/umd/*.js' build --rename=html-validator.umd.cjs",
+      "step:06": "cpy build/umd/html-validator.js build --rename=html-validator.umd.cjs",
       "step:07": "add-dist-header build dist",
       "pretest": "npm-run-all step:*",
       "test": "mocha spec --timeout 5000"
@@ -89,7 +89,7 @@
       "@types/through2": "~2.0",
       "@typescript-eslint/eslint-plugin": "~4.32",
       "@typescript-eslint/parser": "~4.32",
-      "add-dist-header": "~0.0",
+      "add-dist-header": "~0.1",
       "assert-deep-strict-equal": "~0.0",
       "cpy-cli": "~3.1",
       "eslint": "~7.32",

spec/mocha.spec.js

@@ -156,10 +156,10 @@ describe('The gulp-w3c-html-validator reporter()', () => {
    it('displays validation messages for an invalid HTML file', (done) => {
       const spy = sinon.spy(process.stdout, 'write');
       const vinylOptions = {
-         path:     'spec/html/invalid.html',
-         cwd:      'spec/',
-         base:     'spec/html/',
-         contents: readFileSync('spec/html/invalid.html'),
+         path:             'spec/html/invalid.html',
+         cwd:              'spec/',
+         base:             'spec/html/',
+         contents:         readFileSync('spec/html/invalid.html'),
          w3cHtmlValidator: analyzedFiles.invalid[0].w3cHtmlValidator,
          };
       const mockFile = new Vinyl(vinylOptions);
@@ -168,7 +168,7 @@ describe('The gulp-w3c-html-validator reporter()', () => {
       const handleEndOfStream = () => {
          // To view raw output: console.log(spy.secondCall.args);
          spy.restore();
-         const headerLine =  /spec\/html\/invalid.html.*validation:.*fail \(messages: 2\)/;
+         const headerLine =  /3c-html-validator.*spec\/html\/invalid.html.*fail \(messages: 2\)/;
          const warningLine = /HTML warning:/;
          const errorLine =   /HTML error:/;
          const actual = {