Write sourcemaps for the serve mode's default target again

[mischnic]

↪️ Pull Request

Regression from #4528 found by @wbinnssmith

[height]

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[parcel-benchmark]

Benchmark Results

Kitchen Sink ✅

Timings

Description	Time	Difference
Cold	5.71s	-519.00ms 🚀
Cached	2.24s	+28.00ms

Cold Bundles

Bundle	Size	Difference	Time	Difference
dist/legacy/parcel.d5807e82.webp	102.94kb	+0.00b	292.00ms	+60.00ms ⚠️
dist/modern/parcel.d5807e82.webp	102.94kb	+0.00b	291.00ms	+59.00ms ⚠️
dist/legacy/kitchen-sink.679578a5.js	1.16kb	+0.00b	1.46s	-115.00ms 🚀
dist/modern/kitchen-sink.90de237b.js	1.16kb	+0.00b	1.46s	-116.00ms 🚀
dist/legacy/index.html	709.00b	+0.00b	673.00ms	+63.00ms ⚠️
dist/modern/index.html	709.00b	+0.00b	670.00ms	+62.00ms ⚠️
dist/legacy/styles.afb8e31a.css	78.00b	+0.00b	1.30s	-276.00ms 🚀

Cached Bundles

Bundle	Size	Difference	Time	Difference
dist/legacy/parcel.d5807e82.webp	102.94kb	+0.00b	287.00ms	+38.00ms ⚠️
dist/modern/parcel.d5807e82.webp	102.94kb	+0.00b	288.00ms	+39.00ms ⚠️

React HackerNews ✅

Timings

Description	Time	Difference
Cold	8.79s	+170.00ms
Cached	2.25s	+70.00ms

Cold Bundles

No bundle changes detected.

Cached Bundles

Bundle	Size	Difference	Time	Difference
dist/main/index.js	66.80kb	+0.00b	258.00ms	+54.00ms ⚠️
dist/module/index.js	37.47kb	+0.00b	256.00ms	+52.00ms ⚠️

AtlasKit Editor 🚨

Timings

Description	Time	Difference
Cold	FAILED	-0.00ms
Cached	FAILED	-0.00ms

Cold Bundles

No bundles found, this is probably a failed build...

Cached Bundles

No bundles found, this is probably a failed build...

Three.js x4 🚨

Timings

Description	Time	Difference
Cold	FAILED	-0.00ms
Cached	FAILED	-0.00ms

Cold Bundles

No bundles found, this is probably a failed build...

Cached Bundles

No bundles found, this is probably a failed build...

Click here to view a detailed benchmark overview.