Update dependency mocha to v9

This MR contains the following updates:

Package	Type	Update	Change
mocha (source)	devDependencies	major	^8.0.1 -> ^9.0.0

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Release Notes

mochajs/mocha

v9.0.0

Compare Source

💥 Breaking Changes

• #​4633: Drop Node.js v10.x support (@​juergba)

• #​4635: import-first loading of test files (@​giltayar)

Mocha is going ESM-first! This means that it will now use ESM import(test_file) to load the test files, instead of the CommonJS require(test_file). This is not a problem, as import can also load most files that require does. In the rare cases where this fails, it will fallback to require(...). This ESM-first approach is the next step in Mocha's ESM migration, and allows ESM loaders to load and transform the test file.

• #​4636: Remove deprecated utils.lookupFiles() (@​juergba)

• #​4638: Limit the size of actual/expected for diff generation (@​juergba)

• #​4389: Refactoring: Consuming log-symbols alternate to code for win32 in reporters/base (@​MoonSupport)

🎉 Enhancements

• #​4640: Add new option --dry-run (@​juergba)

🐛 Fixes

• #​4128: Fix: control stringification of error message (@​syeutyu)

🔩 Other

• #​4646: Deprecate Runner(suite: Suite, delay: boolean) signature (@​juergba)
• #​4643: Update production dependencies (@​juergba)

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