Add warning in development when a result function is `x => x`. #286

Job	Run time
Build and Test on Node 16.x	22s
Check package config with are-the-types-wrong (16.x)	13s
Test Types with TypeScript 4.7	56s
Test Published Artifact cra4	1m 46s
Test Types with TypeScript 4.8	59s
Test Published Artifact cra5	1m 36s
Test Types with TypeScript 4.9	28s
Test Published Artifact next	1m 30s
Test Types with TypeScript 5.0	42s
Test Published Artifact vite	1m 9s
Test Types with TypeScript 5.1	42s
Test Published Artifact node-standard	20s
Test Types with TypeScript 5.2	38s
Test Published Artifact node-esm	16s
	11m 37s

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