Every package should get its own copy of the three files in this directory and the one in test/ (which should go in an
analogous spot in the package). Package-specific options should go in tsconfig.json and test-specific options in
tsconfig.test.json. The types file shouldn't need to be modified, and only exists because tsconfigs don't support
multiple inheritance. The same goes for the file in test/, which only exists because VSCode only knows to look for a
file named (exactly) tsconfig.json.