Housekeeping + prepare v17.6.0

[nikku]

Proposed Changes

• Additional housekeeping

Checklist

Ensure you provide everything we need to review your contribution:

• Contribution meets our definition of done
• Pull request establishes context
  • Link to related issue(s), i.e. Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}
  • Brief textual description of the changes
  • Screenshots or short videos showing UI/UX changes
  • Steps to try out, i.e. using the @bpmn-io/sr tool

[Copilot]

Pull request overview

This PR prepares the dmn-js repository for the v17.6.0 release by performing housekeeping tasks. The changes primarily focus on removing remnants of IE 11 support and updating various development dependencies to their latest versions.

Changes:

• Removed IE 11 support code including polyfills from ContentEditable component and karma-ie-launcher dependency
• Updated multiple devDependencies including @babel packages, eslint, mocha, puppeteer, webpack, and build tools
• Updated documentation to remove IE 11 references from bug report template and contributing guide

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/dmn-js/CHANGELOG.md	Documents version 17.6.0 changes including IE 11 removal and dependency updates
packages/dmn-js/package.json	Updates devDependencies (axe-core, cpy, diagram-js, execa)
packages/dmn-js-shared/package.json	Updates testing-library/dom and diagram-js dependencies
packages/dmn-js-literal-expression/package.json	Updates testing-library/dom and diagram-js dependencies
packages/dmn-js-drd/package.json	Updates testing-library/dom and diagram-js dependencies
packages/dmn-js-decision-table/package.json	Updates diagram-js dependency
packages/dmn-js-boxed-expression/package.json	Updates axe-core, cross-env, and diagram-js dependencies
packages/dmn-js-shared/src/components/ContentEditable.js	Removes IE 11 polyfill code and isIE() helper function
package.json	Updates root devDependencies, removes karma-ie-launcher
.github/ISSUE_TEMPLATE/BUG_REPORT.md	Updates browser/OS examples to remove IE 11 references
.github/CONTRIBUTING.md	Removes IE from TEST_BROWSERS documentation

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[barmac]

Works fine, let's release it.