Fix TS issues in `writeGitVersion` #987

Job	Run time
Build and Test on Node 20.x	47s
Check package config with are-the-types-wrong (20.x)	41s
Test Published Artifact cra4	2m 2s
Test Types with TypeScript 4.7	40s
Test Published Artifact cra5	1m 31s
Test Types with TypeScript 4.8	45s
Test Published Artifact next	1m 7s
Test Types with TypeScript 4.9	42s
Test Published Artifact vite	58s
Test Types with TypeScript 5.0	38s
Test Published Artifact node-standard	34s
Test Types with TypeScript 5.1	37s
Test Published Artifact node-esm	17s
Test Types with TypeScript 5.2	35s
Test Published Artifact react-native	1m 19s
Test Types with TypeScript 5.3	39s
Test Published Artifact expo	1m 13s
Test Types with TypeScript 5.4	34s
	15m 39s

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