build(deps): bump image from 4.8.0 to 4.9.1

[dependabot]

Bumps image from 4.8.0 to 4.9.1.

Changelog

Sourced from image's changelog.

4.9.1

• Remove meta dependency.

4.9.0

• Fix minMax returning incorrect values when the minimum or maximum was in the first pixel of a multi-channel image.
• Fix copyResizeCropSquare ignoring the crop offset when using non-nearest interpolation, which off-centered the resized result.
• Improve the precision of the RGB/XYZ/CIE-Lab color conversions, and round rather than truncate the final RGB values, making the conversions lossless.
• Fix copyResizeCropSquare throwing a range error when a non-zero radius was used with a non-square image.
• Fix non-antialiased drawLine drawing diagonal lines offset by ~1 pixel.
• Preserve EXIF metadata when expanding an image with copyExpandCanvas.
• Image.convert now applies an explicitly provided alpha value even when the format and channel count are unchanged.
• Fix a range error in Image.fromBytes when the source row stride is smaller than the image's row stride.
• Fix a RangeError when decoding images with corrupt EXIF data.
• Reject non-BMP files that merely start with the BM signature instead of crashing the decoder.
• Fix noise with NoiseType.saltAndPepper producing colored pixels instead of black/white ones.
• colorOffset now scales its offsets to the bit depth of the image, so the effect is consistent regardless of the image's format.
• Add fuzzy and padding options to trim and findTrim.
• Add findEncoderForData, which returns an Encoder for a buffer of image data, complementing findDecoderForData.
• Add a dispose option to GifEncoder to control the frame disposal method.
• PsdImage.layers no longer throws a LateInitializationError when accessed before decode has been called.

Commits

• da0106c remove meta dependency
• 05b1090 change meta dependency to 1.18.0
• e6b33bd fix cmd test not saving gif output
• 011c784 update version
• e3916e6 add more analysis rules; dart format
• cafa9a1 Stop testImageConversions from writing per-conversion debug PNGs
• b7e4786 Fix more triaged issue-tracker bugs
• 1193a60 Strengthen test suite with invariant-based assertions
• 5259c22 Fix a batch of triaged issue-tracker bugs
• fd0a9f1 Fix decodePnmFile using Png instead of Pnm
• Additional commits viewable in compare view

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[beeswaxpat]

Closing: image 4.9.1 requires Flutter 3.44.6, and this repo pins Flutter 3.38.6 across CI and the release workflow, so this bump fails to resolve. It is a routine version bump rather than a security fix, so it can wait for a deliberate Flutter SDK upgrade. Dependabot will re-open a bump once the SDK constraint allows it.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.