Bump mime to c0c4c47a3d7bf696f1aa1959fb83d598baadb33c

Changes:
```
> git log --format="%C(auto) %h %s" d80f4d0..c0c4c47
 https://dart.googlesource.com/mime.git/+/c0c4c47 Add .webmanifest to extension map (#29)
 https://dart.googlesource.com/mime.git/+/642c9ce Improve handling for audio: aac, mp3, ogg, webm (#57)
 https://dart.googlesource.com/mime.git/+/a714658 Add image/heif to extension map (#52)
 https://dart.googlesource.com/mime.git/+/4529fa7 Add woff2 mime type (#43)
 https://dart.googlesource.com/mime.git/+/b5f5087 Add application/toml mimeType lookup by file path (#64)
 https://dart.googlesource.com/mime.git/+/dcf97ee Add `image/heic` mime type (#58)

```

Diff: https://dart.googlesource.com/mime.git/+/d80f4d09067af87d84d9cb647acfa4d2d313d795~..c0c4c47a3d7bf696f1aa1959fb83d598baadb33c/
Change-Id: I3f2a8dde66c1c2744e708999e56f5441bc389e91
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/270220
Auto-Submit: Nate Bosch <[email protected]>
Commit-Queue: Nate Bosch <[email protected]>
Commit-Queue: Kevin Moore <[email protected]>
Reviewed-by: Kevin Moore <[email protected]>

Author: natebosch

DEPS

@@ -142,7 +142,7 @@ vars = {
   "markdown_rev": "a70b93a1a004cc1da04a3e3ea59821ef8391e0d6",
   "markupsafe_rev": "8f45f5cfa0009d2a70589bcda0349b8cb2b72783",
   "matcher_rev": "6a9b83bbd73e50df2058b3e8e4aa301df49569c6",
-  "mime_rev": "d80f4d09067af87d84d9cb647acfa4d2d313d795",
+  "mime_rev": "c0c4c47a3d7bf696f1aa1959fb83d598baadb33c",
   "mockito_rev": "748e88e4cbf7e3acd1144cd8e3ea4ae87ea8c9c2",
   "package_config_rev": "cff98c90acc457a3b0750f0a7da0e351a35e5d0c",
   "path_rev": "58ba22c53e40a05c407abb070ec63674b3a38c4d",