Allow any scope casing for Conventional Commits (#2529)

* Allow any scope casing for Conventional Commits

* Remove obsolete scope casing restriction test

Author: kripod

@commitlint/config-conventional/index.js

@@ -6,7 +6,6 @@ module.exports = {
 		'footer-leading-blank': [1, 'always'],
 		'footer-max-line-length': [2, 'always', 100],
 		'header-max-length': [2, 'always', 100],
-		'scope-case': [2, 'always', 'lower-case'],
 		'subject-case': [
 			2,
 			'never',

@commitlint/config-conventional/index.test.js

@@ -5,7 +5,6 @@ const messages = {
 	invalidTypeEnum: 'foo: some message',
 	invalidTypeCase: 'FIX: some message',
 	invalidTypeEmpty: ': some message',
-	invalidScopeCase: 'fix(SCOPE): some message',
 	invalidSubjectCases: [
 		'fix(scope): Some message',
 		'fix(scope): Some Message',
@@ -52,12 +51,6 @@ const errors = {
 		name: 'type-empty',
 		valid: false,
 	},
-	scopeCase: {
-		level: 2,
-		message: 'scope must be lower-case',
-		name: 'scope-case',
-		valid: false,
-	},
 	subjectCase: {
 		level: 2,
 		message:
@@ -134,13 +127,6 @@ test('type-empty', async () => {
 	expect(result.errors).toEqual([errors.typeEmpty]);
 });
 
-test('scope-case', async () => {
-	const result = await lint(messages.invalidScopeCase, rules);
-
-	expect(result.valid).toBe(false);
-	expect(result.errors).toEqual([errors.scopeCase]);
-});
-
 test('subject-case', async () => {
 	const invalidInputs = await Promise.all(
 		messages.invalidSubjectCases.map((invalidInput) =>