pairs using Object.keys rather than Object.entries?

[Sawtaytoes]

I noticed the pairs says it uses Object.keys instead of Object.entries. Is this still valid? If so, any reason it doesn't use .entries? Is it because of compatibly with older Node.js and browsers?

[cartant]

rxjs/src/internal/observable/pairs.ts

Lines 5 to 7 in c6ba979

	/**
	* @deprecated To be removed in version 8. Use `from(Object.entries(obj))` instead.
	*/