fix: handle precedence and defaults correctly

Author: marionebl

.conventional-changelog-lintrc

@@ -1,6 +1,11 @@
 import merge from 'lodash.merge';
+import pick from 'lodash.pick';
 import rc from 'rc';
 
+const defaults = {
+	extends: ['angular']
+};
+
 // Resolve extend configs
 function resolveExtends(config, prefix = '', key = 'extends') {
 	return Object.values(config[key] || [])
@@ -21,5 +26,10 @@ export default (name = 'conventional-changelog-lint', settings = {
 	prefix: 'conventional-changelog-lint-config'
 }, seed = {}) => {
 	const config = merge(rc(name, settings.defaults), seed);
-	return resolveExtends(config, settings.prefix);
+	const opts = merge({}, defaults, pick(config, ['extends']));
+	return merge(
+		{},
+		resolveExtends(opts, settings.prefix),
+		config
+	);
 };