Bump mime dependency

[blasten]

Fixes:

Because shelf_static >=0.2.8 depends on mime ^0.9.0 and shelf_static >=0.1.0+1 <0.2.8 requires SDK version >=1.0.0 <2.0.0 or >=2.0.0-dev.55.0 <2.0.0, shelf_static >=0.1.0+1 requires mime ^0.9.0.
And because test >=1.16.0-nullsafety.7 depends on shelf_static ^0.2.6, test >=1.16.0-nullsafety.7 requires mime ^0.9.0.
So, because share depends on both mime ^1.0.0-nullsafety.0 and test ^1.16.0-nullsafety.13, version solving failed.

[blasten]

cc @kevmoo