refactor: simplify wrap_value by removing redundant empty map check (… #298

Job	Run time
Default Features (batteries_included + v4)	1m 19s
Security Audit	2m 39s
Test Suite (v1_local)	57s
Test Suite (v2_public)	55s
Test Suite (v1_public)	1m 4s
Test Suite (v2_local)	54s
Test Suite (v3_local)	59s
Clippy (v1_public)	25s
Test Suite (v4_public)	56s
Clippy (v1_local)	41s
Test Suite (v4_local)	57s
Test Suite (v3_public)	1m 0s
Clippy (v3_public)	28s
Clippy (v2_local)	38s
Clippy (v4_public)	51s
Clippy (v4_local)	31s
Clippy (v2_public)	26s
Clippy (v3_local)	29s
	16m 9s

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