`rxjs` was only a dependency for the `tap` operator which can be replaced
by accessing the result object returned from awaiting the builder output
`Observable` which is already converted to a Promise.
rules_nodejs 4 requires that a package_name property be specified within a ts_library rule for the output to be linked into the package repository. Failing to add the property can cause test failures due to unresolved packages.
Contains fixes related to the symlink behaviour inside of bazel. Without it, webpack needs to be configured to be aware of symlinks and preserve the paths.
Without this change, module names will be computed with incorrect paths containing duplicate path fragments (e.g. `@angular-devkit/architect/testing/testing/test-logger`).
