Bump mkttf from `315cb3b` to `f54356c`

[dependabot[bot]]

Bumps mkttf from 315cb3b to f54356c.

Commits

• f54356c Use max deflate compression for the non-Windows variant, too.
• 1505a47 Bump copyright.
• 91df118 Merge branch 'bkmgit-remove-space'
• 88f4dd8 GH-10: "Bold Italic" is not a valid PS font name.
• ea0bf82 Merge branch 'remove-space' of https://github.com/bkmgit/mkttf into bkmgit-re...
• 31ef401 Set vendor ID to "AX86" (closes #12).
• 2f4ecf9 Upscale bitmaps before tracing them.
• 8b2357e Use Bold-Italic instead of 'Bold Italic'
• ac4fc07 Remove space in name Bold Italic
• See full diff in compare view

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