build(deps): bump xterm from 4.13.0 to 4.19.0 in /html

[dependabot]

Bumps xterm from 4.13.0 to 4.19.0.

Release notes

Sourced from xterm's releases.

4.19.0

🚀 Features

• The minimum contrast ratio feature will now change luminance in the opposite direction if the contrast ratio isn't met (#3806, #3808) via @​Tyriar. For example a red foreground on a slightly darker red background will try lighten the color and if the minimumContrastRatio option isn't met when #FFFFFF is reached it will try moving it towards [#000000](https://github.com/xtermjs/xterm.js/issues/000000). This can cause somewhat unexpected results by changing explicitly styled whites to blacks for example but it's really good for accessibility.
• The library now supports parsing #rgb, #rgba, rgb(r, g, b) and rgba(r, g, b, a) color formats (#3815, #3819, #3823) via @​ChaseKnowlden, @​Tyriar
• Opaque selectionBackground is now supported in the DOM renderer (#3839) via @​Tyriar
• The symbol powerline font glyphs now use custom rendering when ITerminalOptions.customGlyphs is enabled (#3856, #3862, #3866) via @​Tyriar This has multiple benefits:
  • A patched powerlines font doesn't need to be installed to render the most common characters
  • Ugly lines due to anti-aliasing that can appear no longer do
  • The glyphs always use greyscale anti-aliasing (not sub-pixel)
  • ITerminalOptions.lineHeight is taken into account when rendering the glyph

📦 API

• The overview ruler is a companion feature to the decorations introduced in 4.18.0 which shows little indicators on the scroll bar (#3676, #3687, #3688, #3689, #3693, #3694, #3695, #3697, #3702, #3711, #3723, #3730, #3733, #3738, #3788, #3791, #3792, #3841) via @​meganrogge, @​Tyriar. To use it, add the overviewRulerOptions property to a decoration's IDecorationOptions and it will automatically show up in the overview ruler.

  const marker = term.addMarker(1);
  const decoration = term.registerDecoration({
    marker,
    x: 5,
    overviewRulerOptions: {
      color: '#FF0000',
      position: 'left'
    }
  });
  decoration.onRender(() => {
    decoration.element.style.backgroundColor = 'red';
  });

  The width of the resulting overview ruler is controlled by ITerminalOptions.overviewRulerWidth.
• Decorations can now change a cell's background and foreground colors (#3775, #3782) via @​Tyriar. When this is set, the minimum contrast ratio feature will also be in effect.

  const decoration = term.registerDecoration({
    marker,
    backgroundColor: '#ff0000',
    foregroundColor: '#ffffff'
  });

• Decorations can now specify the layer property to allow rendering above the selection (#3785, #3800) via @​Tyriar

  const decoration = term.registerDecoration({
    marker,
    layer: 'top'
  });

• There's a new selectionForeground theme color, when set this will use a static color for selections (#3813) via @​Tyriar

  const term = new Terminal({

... (truncated)

Commits

• 4a61642 Merge pull request #3879 from Tyriar/r4_19
• 0a0ebb6 v4.19.0
• e77a0ec return 0 instead of -1 for no result find count (#3874)
• 1bf2ccc Merge pull request #3876 from yankay/add-cloudtty-to-list-of-xterm-users
• 5f680c2 add-cloudtty-to-list-of-xterm-users
• 3845008 Merge pull request #3728 from serkodev/fix-caps-lock-ime
• 1801403 Move off deprecated keyCode -> key
• 4c7d89e Merge branch 'master' into fix-caps-lock-ime
• 5d3a9e8 Merge pull request #3726 from Eugeny/fix-macos-alt-n
• 911d922 Merge pull request #3763 from robinfai/master
• Additional commits viewable in compare view

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