The typescript compiler is now configured to know about the import map
to be able to resolve those imports and find the associated types.
As tsc outputs declaration files using the original module identifiers
and not the resolved ones, tsc-alias is used to post-process the
declaration files by resolving those paths.
Some configurations settings like `paths` cannot be provided through CLI
arguments but only in a configuration file. And when using a
configuration file, only a few options (like `--outDir` can still be
provided) through the CLI.