New version: MolecularGraph v0.16.0

[JuliaRegistrator]

• Registering package: MolecularGraph
• Repository: https://github.com/mojaie/MolecularGraph.jl
• Created by: @mojaie
• Version: v0.16.0
• Commit: 9b6ccf0baa37dd65f768d6d7cd528df40f2f25a7
• Reviewed by: @mojaie
• Reference: mojaie/MolecularGraph.jl@9b6ccf0#commitcomment-136695279
• Description: Graph-based molecule modeling toolkit for cheminformatics
• Release notes:

## Breaking changes

- `html_fixed_size` and `html_grid` now takes MolGraph objects, not SVG.
- Some molecule parameter methods for 2D drawing (e. g. is_atom_visible, double_bond_style) are no longer exposed.
- Added Cairo.jl to the dependencies

[github-actions]

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