Bump mutagen from 1.34.1 to 1.41.1

Bumps [mutagen](https://github.com/quodlibet/mutagen) from 1.34.1 to 1.41.1.
- [Release notes](https://github.com/quodlibet/mutagen/releases)
- [Changelog](https://github.com/quodlibet/mutagen/blob/master/docs/changelog.rst)
- [Commits](quodlibet/mutagen@release-1.34.1...release-1.41.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

requirements.txt

@@ -4,7 +4,7 @@ coverage==4.2
 discogs-client==2.2.1
 requests==2.9.1
 lxml==3.6.0
-mutagen==1.34.1
+mutagen==1.41.1
 pylint==1.6.4
 nltk==3.2
 nose2==0.6.5