fix(rules): do not negate case rules (#330)

Many scripts, i.e. Han, Devanagari, are not cased. Thus `ensureCase` will always return true for texts written in these scripts on any case rules.

Negating case rules will cause `test: 你好` as invalid since they are conformed to any case rules.

For definition of cased, see http://unicode.org/reports/tr44/#Cased

Author: JLHwung

@commitlint/config-angular/index.js

@@ -8,8 +8,8 @@ module.exports = {
 		'scope-case': [2, 'always', 'lower-case'],
 		'subject-case': [
 			2,
-			'never',
-			['sentence-case', 'start-case', 'pascal-case', 'upper-case']
+			'always',
+			['camel-case', 'kebab-case', 'lower-case', 'snake-case']
 		],
 		'subject-empty': [2, 'never'],
 		'subject-full-stop': [2, 'never', '.'],

@commitlint/config-conventional/index.js

@@ -6,8 +6,8 @@ module.exports = {
 		'scope-case': [2, 'always', 'lower-case'],
 		'subject-case': [
 			2,
-			'never',
-			['sentence-case', 'start-case', 'pascal-case', 'upper-case']
+			'always',
+			['camel-case', 'kebab-case', 'lower-case', 'snake-case']
 		],
 		'subject-empty': [2, 'never'],
 		'subject-full-stop': [2, 'never', '.'],