baseUrl incorrectly resolved when tsconfig file not in working directory

[drumminj]

If the project file (tsconfig.json) specified on the command line is in a directory other than the current working directory, non-relative path imports aren't correctly resolved.

baseUrl (and paths in tsconfig) are normally relative to the location of tsconfig.json. However, it appears the TypeScript API being called to parse the config file may be behaving differently, instead relying on the path provided to parseJsonConfigFileContent()

See: https://github.com/evolution-gaming/tsc-silent/blob/master/src/tsc-silent.ts#L114

A local change to instead pass path.dirname(argv.project) instead of process.cwd() appears to fix the issue.