Fix Node package importer tests #1369

Job	Run time
Lint spec files	16s
Unit tests	36s
Language \| Dart Sass \| Dart stable	57s
Static analysis	22s
Language \| Dart Sass \| Dart dev	58s
JS API \| Pure JS \| Node lts/* \| ubuntu-latest	1m 19s
JS API \| Pure JS \| Browser	1m 25s
JS API \| Pure JS \| Node lts/* \| windows-latest	3m 23s
JS API \| Embedded \| Node lts/* \| ubuntu-latest	4m 51s
JS API \| Pure JS \| Node lts/* \| macos-latest	2m 40s
JS API \| Embedded \| Node lts/* \| windows-latest	7m 29s
JS API \| Embedded \| Node lts/* \| macos-latest	9m 17s
JS API \| Embedded \| Node lts/-1 \| ubuntu-latest	5m 4s
JS API \| Pure JS \| Node lts/-1 \| ubuntu-latest	1m 15s
JS API \| Embedded \| Node lts/-2 \| ubuntu-latest	5m 11s
JS API \| Pure JS \| Node lts/-2 \| ubuntu-latest	1m 43s
JS API \| Embedded \| Node lts/-3 \| ubuntu-latest	5m 10s
JS API \| Pure JS \| Node lts/-3 \| ubuntu-latest	1m 25s
	53m 21s

Provide feedback