chore: downgrade vexflow to 1.2.93 again (#706)
chore: downgrade vexflow to 1.2.93 again (#706)

there are still a few critical issues with the Vexflow 3x versions, see #706.
vexflow 1.2.93 has better measure layouting for measures with half notes.
also, there is no overlap of notes into the next measure.

tabs look better with 1.2.93 as well.

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