Fixing component css in #4667 uncovered errors in CSS url processing.
This PR correctly composes absolute urls when using `--base-href` and/or `--deploy-url`.
It also fixes asset output on `--aot` mode.
Fix#4778Fix#4782Fix#4806
* test: add license test
* only check prod dependencies
* remove findup dep
* also check dev deps
* add map-stream to ignore list
* remove license-checker
* add comment
* use logger
* fix lint errors