feat(commitizen): provide a customized commitizen adapter configuration

closes #20

.cz-config.js

+module.exports = {
+  types: [
+    { value: 'tr-s', name: 'tr-s:     Small addition to or revision of Technical reference.' },
+    { value: 'tr-m', name: 'tr-m:     Medium addition to or revision of Technical reference.' },
+    { value: 'tr-l', name: 'tr-l:     Huge contribution to or revision of Technical reference.' },
+    { value: 'feat', name: 'feat:     A new feature' },
+    { value: 'fix', name: 'fix:      A bug fix' },
+    { value: 'docs', name: 'docs:     General documentation only changes' },
+    {
+      value: 'style',
+      name:
+        'style:    Changes that do not affect the meaning of the code\n            (white-space, formatting, missing semi-colons, etc)',
+    },
+    { value: 'test', name: 'test:     Adding missing tests' },
+    {
+      value: 'build',
+      name:
+        'build:    Changes that affect the build system or dependencies\n            (example scopes: npm, docker, pip, ant)',
+    },
+    {
+      value: 'ci',
+      name:
+        'ci:       Changes to the CI configuration\n            (example scopes: gitlab, travis)',
+    },
+    {
+      value: 'chore',
+      name:
+        'chore:    Other changes that modify other than source or test files'
+    },
+    { value: 'revert', name: 'revert:   Revert to a commit' },
+  ],
+
+  // it needs to match the value for field type. Eg.: 'fix'
+  /*
+  scopeOverrides: {
+    fix: [
+
+      {name: 'merge'},
+      {name: 'style'},
+      {name: 'e2eTest'},
+      {name: 'unitTest'}
+    ]
+  },
+  */
+  // override the messages, defaults are as follows
+  messages: {
+    type: "Select the type of change that you're committing:",
+    scope: '\nDenote the SCOPE of this change (optional):',
+    // used if allowCustomScopes is true
+    customScope: 'Denote the SCOPE of this change:',
+    subject: 'Write a SHORT, IMPERATIVE tense description of the change:\n',
+    body: 'Provide a LONGER description of the change (optional). Use "|" to break new line:\n',
+    breaking: 'List any BREAKING CHANGES (optional):\n',
+    footer: 'Reference ISSUES touched by this change (optional). E.g.: closes #31, see #34:\n',
+    confirmCommit: 'Are you sure you want to proceed with the commit above?',
+  },
+
+  allowCustomScopes: true,
+  allowBreakingChanges: ['feat', 'fix'],
+  // skip any questions you want
+  skipQuestions: ['body'],
+
+  // limit subject length
+  subjectLimit: 100,
+  // breaklineChar: '|', // It is supported for fields body and footer.
+  footerPrefix : ''
+  // askForBreakingChangeFirst : true, // default is false
+};