fix: correct order of merging plugins

Author: armano2

@commitlint/resolve-extends/src/index.test.ts

@@ -370,7 +370,7 @@ test('plugins should be merged correctly', () => {
 
 	const expected = {
 		extends: ['extender-name'],
-		plugins: ['test', 'test2', 'test3'],
+		plugins: ['test3', 'test2', 'test'],
 		zero: 'root',
 	};
 

@commitlint/resolve-extends/src/index.ts

@@ -38,7 +38,7 @@ export default function resolveExtends(
 			mergeWith(r, c, (objValue, srcValue, key) => {
 				if (key === 'plugins') {
 					if (Array.isArray(objValue)) {
-						return srcValue.concat(objValue);
+						return objValue.concat(srcValue);
 					}
 				} else if (Array.isArray(objValue)) {
 					return srcValue;