v1.6.9

Changes

• Add built-in number, bracket and operator faces
• Update tag icons in treemacs theme
• Update default bg colors in ocean theme
• Adjust a bit bg0 in blossom theme
• Adjust alt bg0 in ocean theme
• Change prep color in galaxy theme
• Use cerise3 for numbers in bubblegum theme
• Slightly adjust color contrast in bubblegum theme
• Fix warnings: use unspecified symbol instead of nil