Bump SixLabors.ImageSharp from 2.1.3 to 2.1.8 in /CgfConverter

[dependabot[bot]]

Bumps SixLabors.ImageSharp from 2.1.3 to 2.1.8.

Release notes

Sourced from SixLabors.ImageSharp's releases.

v2.1.8

What's Changed

• V2 - Limit Read Palette Indices by @​JimBobSquarePants in SixLabors/ImageSharp#2719
• V2 - Clear Pixel Buffers on Decode. by @​JimBobSquarePants in SixLabors/ImageSharp#2717
• V2 - Limit all memory allocations in the MemoryAllocator layer by @​JimBobSquarePants in SixLabors/ImageSharp#2715

Full Changelog: https://github.com/SixLabors/ImageSharp/compare/v2.1.7...v2.1.8

v2.1.7

What's Changed

• [release/2.1] Disallow allocation attempts of unrepresentable sizes by @​antonfirsov in SixLabors/ImageSharp#2553
• [release/2.1] Tiff decoding robustness improvements (#2550) by @​antonfirsov in SixLabors/ImageSharp#2554
• [release/2.1] PBM decoder robustness improvements and BufferedReadStream observability by @​antonfirsov in SixLabors/ImageSharp#2555
• Backport 2681 by @​JimBobSquarePants in SixLabors/ImageSharp#2688

Full Changelog: https://github.com/SixLabors/ImageSharp/compare/v2.1.6...v2.1.7

v2.1.6

What's Changed

• Backport - Handle EOF in Jpeg bit reader when data is bad to prevent DOS attack. by @​JimBobSquarePants in SixLabors/ImageSharp#2524

Full Changelog: https://github.com/SixLabors/ImageSharp/compare/v2.1.5...v2.1.6

v2.1.5

What's Changed

• Backport #2501 by @​JimBobSquarePants in SixLabors/ImageSharp#2509

Full Changelog: https://github.com/SixLabors/ImageSharp/compare/v2.1.4...v2.1.5

v2.1.4

What's Changed

• Backport WebP fix to 2.1 by @​antonfirsov in SixLabors/ImageSharp#2420

Full Changelog: https://github.com/SixLabors/ImageSharp/compare/v2.1.3...v2.1.4

Commits

• f21d641 Merge pull request #2715 from SixLabors/backport/v2-memlimit
• 8f0b4d3 Merge pull request #2717 from SixLabors/backport/v2-clear-buffers
• cf9496d test allocation limits
• 3d298db Adapt BmpDecoder_ThrowsException_Issue2696 for V2
• a78ce27 Merge pull request #2719 from SixLabors/backport/v2-check-palette-indices
• e620914 Clamp read palette indices.
• c122185 Clear pixel buffers on decode.
• 5c6ec5d Limit all allocations
• fa7d712 Merge pull request #2688 from SixLabors/js/backport-2681
• 36b3533 Use correct property to disable upstream warnings.
• Additional commits viewable in compare view

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