fix(es/minifier): Preserve op of the op-assignments in seq inliner

[kdy1]

Description:

Related issue:

• Closes Value is lost because of compression with comma operator #6407.

---

Investigation

Output of Single-pass

export default class Demo {
    static encode(value) {
        const ranges = [];
        let range = [], retrString = A.encode(value), bitField = '';
        return value.forEach((curValue, i)=>{
            bitField += B.encode(curValue);
            range.push(i);
            ranges.push(range);
        }), retrString = '.' + C.encode(ranges);
    }
}
console.log(Deno.encode());

[kdy1]

swc-bump:

• swc_ecma_minifier

[swc-bot]

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