d2 0.6.4

[BrewTestBot]

Created by brew bump

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Created with brew bump-formula-pr.

release notes

#### Features 🚀

style.underline works on connections #1836
none is added as an accepted value for fill-pattern. Previously there was no way to cancel the fill-pattern on select objects set by a theme that applies it (Origami) #1882

Improvements 🧹

Dimensions can be set less than label dimensions #1901
Boards no longer inherit label fields from parents #1838
Prevents near targeting a child of a special object like grid cells, which wasn't doing anything #1851

Bugfixes ⛑️

Theme flags on CLI apply to PDFs #1894
Fixes styles in connections not overriding styles set by globs #1857
Fixes null being set on a nested shape not working in certain cases when connections also pointed to that shape #1830
Fixes edge case of bad import syntax crashing using d2 as a library #1829
Fixes style.fill not applying to markdown #1872
Fixes compiler erroring on certain styles when the shape's shape value is not all lowercase (e.g. Circle) #1887

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