Bump qs, body-parser and express in /samples/spa-client #3789

Job	Run time
Test Against Snapshots / Test	1m 36s
Build (ubuntu-latest, 17) / Build	41s
Build (windows-latest, 17) / Build	1m 25s
Deploy Docs / Deploy Docs	0s
Perform Release	0s
Deploy Artifacts / Deploy Artifacts	0s
	3m 42s

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