Fix(commitlint): Allow to use upper-case in commit type

  * used only for suppressing the warning when using breaking change type
  * add breaking changes singular to type enum

Author: literat

packages/commitlint-config/index.js

@@ -3,11 +3,31 @@ module.exports = {
   parserPreset: '@lmc-eu/conventional-changelog-lmc',
   ignores: [(commit) => commit.includes('[CI-SKIP]')],
   rules: {
-    'type-case': [1, 'always', 'pascal-case'],
+    'type-case': [
+      1,
+      'always',
+      // We are using `pascal-case` for every type but
+      // allowing `upper-case` only for use of `BREAKING CHANGE(S)`
+      // so this should not lead to define any other type in `upper-case`
+      ['pascal-case', 'upper-case'],
+    ],
     'type-enum': [
       2,
       'always',
-      ['Feat', 'Fix', 'Docs', 'Style', 'Refactor', 'Test', 'Revert', 'Perf', 'Chore', 'Deps', 'BREAKING CHANGES'],
+      [
+        'Feat',
+        'Fix',
+        'Docs',
+        'Style',
+        'Refactor',
+        'Test',
+        'Revert',
+        'Perf',
+        'Chore',
+        'Deps',
+        'BREAKING CHANGES',
+        'BREAKING CHANGE',
+      ],
     ],
     'subject-case': [2, 'always', 'sentence-case'],
   },