Fix TS issues in `writeGitVersion` #180

Job	Run time
Lint, Test, Build & Pack on Node 20.x	28s
Check package config with are-the-types-wrong (20.x)	15s
Test against dist (20.x)	18s
Test Published Artifact cra4	1m 11s
Test Types with TypeScript 4.7	29s
Test Published Artifact cra5	1m 11s
Test Types with TypeScript 4.8	29s
Test Published Artifact next	58s
Test Types with TypeScript 4.9	29s
Test Published Artifact vite	58s
Test Types with TypeScript 5.0	28s
Test Published Artifact node-standard	14s
Test Types with TypeScript 5.1	23s
Test Published Artifact node-esm	16s
Test Types with TypeScript 5.2	25s
Test Published Artifact react-native	1m 12s
Test Types with TypeScript 5.3	26s
Test Published Artifact expo	1m 4s
Test Types with TypeScript 5.4	26s
Test Types with TypeScript 5.5	27s
	12m 7s

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