fix(js_parser): Illegal duplicate default export declarations

[suxin2017]

Summary

fix #1037

    const fn can_merge(a: &ExportDefaultItemKind, b: &ExportDefaultItemKind) -> bool {
        match (a, b) {
            // export default function a():void;
            // export default function a(){
            // }
            (
                ExportDefaultItemKind::FunctionOverload,
                ExportDefaultItemKind::FunctionDeclaration,
            ) => true,
            // export default function a(){};
            // export default interface A{};
            (ExportDefaultItemKind::FunctionDeclaration, ExportDefaultItemKind::Interface) => true,
            // export default interface A{};
            // export default class A{};
            (ExportDefaultItemKind::Interface, ExportDefaultItemKind::ClassDeclaration) => true,
            (_, _) => false,
        }
    }

add can merge function

merge interface and class...

Test Plan

update snapshot

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[Conaclos]

@suxin2017 This seems still triggered for overloads: Playground linlk

[suxin2017]

@suxin2017 This seems still triggered for overloads: Playground linlk

Let me follow up