chore(htmlhint) feature/add commitizen package, husky and prettier

.prettierignore

@@ -0,0 +1,14 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+# production
+/lib
+
+# npm
+package-lock.json
+npm-debug.log*

.prettierrc.json

@@ -0,0 +1,3 @@
+{
+    "singleQuote": true
+}

.travis.yml

@@ -1,28 +1,28 @@
 language: node_js
 cache:
-  directories:
-    - node_modules
-    - ~/.npm
+    directories:
+        - node_modules
+        - ~/.npm
 notifications:
-  email:
-    recipients:
-      - [email protected]
+    email:
+        recipients:
+            - [email protected]
 node_js:
-  - '10'
-  - '9'
-  - '8'
-  - '6'
+    - '10'
+    - '9'
+    - '8'
+    - '6'
 install:
-  - npm install
-  - npm install -g codecov
+    - npm install -g codecov
+    - npm install
 script:
-    - "grunt"
+    - 'grunt'
     - istanbul cover ./node_modules/mocha/bin/_mocha --reporter test -- -R spec
     - codecov
 branches:
-  only:
-    - master
-    - develop
-    - /^greenkeeper/.*$/
-  except:
-    - /^v\d+\.\d+\.\d+$/
+    only:
+        - master
+        - develop
+        - /^greenkeeper/.*$/
+    except:
+        - /^v\d+\.\d+\.\d+$/

commitizen.config.js

@@ -0,0 +1,49 @@
+/* eslint-env node */
+const types = [
+    {
+        value: 'feat',
+        name: 'feat: A new feature'
+    },
+    {
+        value: 'fix',
+        name: 'fix: A bug fix'
+    },
+    {
+        value: 'docs',
+        name: 'docs: Documentation only changes'
+    },
+    {
+        value: 'style',
+        name: `style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)`
+    },
+    {
+        value: 'refactor',
+        name:
+            'refactor: A code change that neither fixes a bug nor adds a feature'
+    },
+    {
+        value: 'perf',
+        name: 'perf: A code change that improves performance'
+    },
+    {
+        value: 'test',
+        name: 'test: Adding missing tests'
+    },
+    {
+        value: 'chore',
+        name: `chore: Changes to the build process or auxiliary tools and libraries such as documentation generation`
+    },
+    {
+        value: 'revert',
+        name: 'revert: Revert to a commit'
+    }
+];
+
+const scopes = ['core', 'cli', 'htmlhint'].map(name => ({ name }));
+
+module.exports = {
+    types,
+    scopes,
+    allowCustomScopes: true,
+    allowBreakingChanges: ['feat', 'fix', 'perf', 'refactor']
+};

commitlint.config.js

@@ -0,0 +1,18 @@
+/* eslint-env node */
+const { types, scopes, allowCustomScopes } = require('./commitizen.config');
+
+const validTypes = types.map(type => type.value);
+const validScopes = scopes.map(scope => scope.name);
+const scopeValidationLevel = allowCustomScopes ? 1 : 2;
+
+module.exports = {
+    extends: ['@commitlint/config-conventional'],
+    parserPreset: './parser-preset',
+
+    // Add your own rules. See http://marionebl.github.io/commitlint
+    rules: {
+        // Apply valid scopes and types
+        'scope-enum': [scopeValidationLevel, 'always', validScopes],
+        'type-enum': [2, 'always', validTypes]
+    }
+};