Merge pull request #25634 from storybookjs/dannyhw/fix-acornparser-wa…

…rning

React: Fix acorn ecma version warning
(cherry picked from commit 5acb52e)

code/renderers/react/src/docs/lib/inspection/acornParser.ts

@@ -206,7 +206,7 @@ function parseExpression(expression: any): ParsingResult<InspectionInferedType>
 }
 
 export function parse(value: string): ParsingResult<InspectionInferedType> {
-  const ast = acornParser.parse(`(${value})`) as unknown as estree.Program;
+  const ast = acornParser.parse(`(${value})`, { ecmaVersion: 2020 }) as unknown as estree.Program;
 
   let parsingResult: ParsingResult<InspectionUnknown> = {
     inferredType: { type: InspectionType.UNKNOWN },