build: bump karma-sourcemap-loader from 0.3.7 to 0.3.8 (#20787)
build: bump karma-sourcemap-loader from 0.3.7 to 0.3.8 (#20787)

Bumps [karma-sourcemap-loader](https://github.com/demerzel3/karma-sourcemap-loader) from 0.3.7 to 0.3.8.
- [Release notes](https://github.com/demerzel3/karma-sourcemap-loader/releases)
- [Commits](https://github.com/demerzel3/karma-sourcemap-loader/commits)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
mmalerba/material2,josephperrott/material2,angular/components,josephperrott/material2,josephperrott/material2,angular/components,DevVersion/material2,crisbeto/material2,mmalerba/material2,crisbeto/material2,andrewseguin/material2,mmalerba/material2,DevVersion/material2,DevVersion/material2,andrewseguin/material2,angular/components,DevVersion/material2,andrewseguin/material2,andrewseguin/material2,josephperrott/material2,mmalerba/material2,josephperrott/material2,crisbeto/material2,mmalerba/material2,angular/components,crisbeto/material2,DevVersion/material2,andrewseguin/material2