Fix TS issues in `writeGitVersion` #181

Job	Run time
Lint, Test, Build & Pack on Node 20.x	29s
Check package config with are-the-types-wrong (20.x)	12s
Test against dist (20.x)	21s
Test Types with TypeScript 4.7	29s
Test Published Artifact cra4	1m 28s
Test Types with TypeScript 4.8	34s
Test Published Artifact cra5	1m 29s
Test Types with TypeScript 4.9	28s
Test Types with TypeScript 5.0	27s
Test Types with TypeScript 5.1	25s
Test Published Artifact next	1m 7s
Test Types with TypeScript 5.2	28s
Test Published Artifact vite	58s
Test Types with TypeScript 5.3	24s
Test Published Artifact node-standard	16s
Test Types with TypeScript 5.4	23s
Test Published Artifact node-esm	15s
Test Types with TypeScript 5.5	22s
Test Published Artifact react-native	3m 13s
Test Published Artifact expo	1m 10s
	14m 58s

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