Fix TS issues in `writeGitVersion` #178

Job	Run time
Lint, Test, Build & Pack on Node 20.x	26s
Check package config with are-the-types-wrong (20.x)	8s
Test against dist (20.x)	17s
Test Types with TypeScript 4.7	28s
Test Published Artifact cra4	1m 34s
Test Types with TypeScript 4.8	28s
Test Published Artifact cra5	1m 21s
Test Types with TypeScript 4.9	33s
Test Published Artifact next	1m 13s
Test Types with TypeScript 5.0	34s
Test Published Artifact vite	1m 0s
Test Types with TypeScript 5.1	23s
Test Published Artifact node-standard	24s
Test Types with TypeScript 5.2	26s
Test Published Artifact node-esm	14s
Test Types with TypeScript 5.3	22s
Test Published Artifact react-native	1m 19s
Test Types with TypeScript 5.4	20s
Test Published Artifact expo	1m 15s
Test Types with TypeScript 5.5	21s
	13m 6s

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