chore: refactor as suggested

Signed-off-by: Ruben Romero Montes <[email protected]>

Author: ruromero

src/providers/javascript_yarn.js

@@ -30,7 +30,7 @@ export default class Javascript_yarn extends Base_javascript {
 		const version = this._version() ?? '';
 		const matches = Javascript_yarn.VERSION_PATTERN.exec(version);
 
-		if (!matches || matches.length < 2) {
+		if (!matches?.length < 2) {
 			throw new Error(`Invalid Yarn version format: ${version}`);
 		}
 

src/providers/processors/yarn_berry_processor.js

@@ -134,7 +134,7 @@ export default class Yarn_berry_processor extends Yarn_processor {
    * @private
    */
 	#purlFromNode(depName, node) {
-		if (!node || !node.children || !node.children.Version) {
+		if (!node?.children?.Version) {
 			return undefined;
 		}