style: improve code formatting and fix lifetime annotations #293

Job	Run time
Default Features (batteries_included + v4)	1m 30s
Test Suite (v1_public)	1m 1s
Security Audit	2m 46s
Test Suite (v1_local)	1m 30s
Test Suite (v3_public)	58s
Test Suite (v2_local)	57s
Test Suite (v4_public)	57s
Test Suite (v4_local)	1m 5s
Test Suite (v2_public)	1m 1s
Clippy (v1_public)	35s
Clippy (v1_local)	17s
Test Suite (v3_local)	57s
Clippy (v4_local)	26s
Clippy (v3_local)	22s
Clippy (v2_public)	24s
Clippy (v2_local)	1m 6s
Clippy (v4_public)	30s
Clippy (v3_public)	34s
	16m 56s

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