Fix TS issues in `writeGitVersion` #810

Job	Run time
Build and Test on Node 20.x	35s
Check package config with are-the-types-wrong (20.x)	17s
Test Published Artifact cra4	1m 22s
Test Types with TypeScript 4.7	42s
Test Published Artifact cra5	1m 18s
Test Types with TypeScript 4.8	42s
Test Published Artifact next	1m 2s
Test Types with TypeScript 4.9	36s
Test Published Artifact vite	56s
Test Types with TypeScript 5.0	33s
Test Published Artifact node-standard	15s
Test Types with TypeScript 5.1	36s
Test Published Artifact node-esm	14s
Test Types with TypeScript 5.2	38s
Test Published Artifact react-native	19s
Test Types with TypeScript 5.3	34s
Test Published Artifact expo	1m 6s
Test Types with TypeScript 5.4	34s
	12m 19s

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