build(deps): bump xterm and xterm-addon-fit (#1146)

* build(deps): bump xterm and xterm-addon-fit

Bumps [xterm](https://github.com/xtermjs/xterm.js) and [xterm-addon-fit](https://github.com/xtermjs/xterm.js). These dependencies needed to be updated together.

Updates `xterm` from 4.19.0 to 5.0.0
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/compare/4.19.0...5.0.0)

Updates `xterm-addon-fit` from 0.5.0 to 0.6.0
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/compare/0.5...0.6)

---
updated-dependencies:
- dependency-name: xterm
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: xterm-addon-fit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* [dependabot skip] Fix yarn.lock

* fix breaking changes for xterm.js 5.x

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot-fix <dependabot-fix@example.com>
Co-authored-by: David Lechner <david@pybricks.com>

src/terminal/Terminal.tsx

@@ -127,7 +127,9 @@ const Terminal: React.FC = (_props) => {
             foreground: isDarkMode ? 'white' : 'black',
             cursor: isDarkMode ? 'white' : 'black',
             // transparency is needed to work around https://github.com/xtermjs/xterm.js/issues/2808
-            selection: isDarkMode ? 'rgb(81,81,81,0.5)' : 'rgba(181,213,255,0.5)', // this should match AceEditor theme
+            selectionBackground: isDarkMode
+                ? 'rgb(81,81,81,0.5)'
+                : 'rgba(181,213,255,0.5)', // this should match editor theme
         };
     }, [isDarkMode]);