Build failure in Node18: You must provide the URL of lib/mappings.wasm by calling SourceMapConsumer.initialize

[EzioLi01]

Details see: ivogabe/gulp-typescript#683.

From react-native 0.73.0, node >=18 is required. After updating node from 16 to 18, project build failed in gulp-typescript package.
Update source-map to 0.7.4 to fix issue.