Fix pubspec back up for flutter beta channel

v0.5.5+1

adjust pubspec

Better inheritence for fill/stroke

v0.5.5

Fix painting inheritence

Whups.

Flutter beta channel wasn't ready for HttpStatus.ok - reverted that.

v0.5.2

Fixes headers processing for network images, fixes opacity inheritance issues

v0.5.0

0.5.0

v0.4.1

bump version

v0.4.0

v0.4.0

Better scaling and color processing

v0.3.3

bump version to v0.3.3

Fix color tinting and caching

v0.3.2

bump ver

Color tinting

v0.3.1

ver bump