Update experiment defaults and documentation to match GitHub Dependab…

…ot v0.296.0 (#1549)

* Update experiment defaults and documentation to match 0.295.0

* Add `allow-refresh-for-existing-pr-dependencies` to default experiments

* Add `python-3-8-unsupported-error` to default experiments

* Add `enable_bun_ecosystem` documentation

---------

Co-authored-by: Rhys Koedijk <rhys@koedijk.co.nz>

README.md

@@ -162,15 +162,26 @@ By default, the enabled experiments will mirror the GitHub-hosted version of Dep
 | All | dependency_change_validation | true/false | /~https://github.com/dependabot/dependabot-core/pull/9888 |
 | All | add_deprecation_warn_to_pr_message | true/false | /~https://github.com/dependabot/dependabot-core/pull/10421 |
 | All | threaded_metadata | true/false | /~https://github.com/dependabot/dependabot-core/pull/9485 |
+| All | enable_shared_helpers_command_timeout | true/false | /~https://github.com/dependabot/dependabot-core/pull/11125 |
+| All | allow_refresh_for_existing_pr_dependencies | true/false | /~https://github.com/dependabot/dependabot-core/pull/11382 |
+| Bun | enable_bun_ecosystem | true/false | /~https://github.com/dependabot/dependabot-core/pull/11446 |
 | Go | tidy | true/false | |
 | Go | vendor | true/false | |
 | Go | goprivate | string | |
-| NPM | npm_fallback_version_above_v6 | true/false | /~https://github.com/dependabot/dependabot-core/pull/10757 |
 | NPM | enable_corepack_for_npm_and_yarn | true/false | /~https://github.com/dependabot/dependabot-core/pull/10985 |
+| NPM | npm_fallback_version_above_v6 | true/false | /~https://github.com/dependabot/dependabot-core/pull/10757 |
+| NPM | npm_v6_deprecation_warning | true/false | /~https://github.com/dependabot/dependabot-core/pull/11112 |
+| NPM | npm_v6_unsupported_error | true/false | /~https://github.com/dependabot/dependabot-core/pull/11112 |
+| NPM | enable_fix_for_pnpm_no_change_error | true/false | /~https://github.com/dependabot/dependabot-core/pull/11291 |
+| NPM | enable_engine_version_detection | true/false | /~https://github.com/dependabot/dependabot-core/pull/11392 |
+| NPM | avoid_duplicate_updates_package_json | true/false | /~https://github.com/dependabot/dependabot-core/pull/11423 |
 | NuGet | nuget_native_analysis | true/false | /~https://github.com/dependabot/dependabot-core/pull/10025 |
 | NuGet | nuget_native_updater | true/false | /~https://github.com/dependabot/dependabot-core/pull/10521 |
 | NuGet | nuget_legacy_dependency_solver | true/false | /~https://github.com/dependabot/dependabot-core/pull/10671 |
 | NuGet | nuget_use_direct_discovery | true/false | /~https://github.com/dependabot/dependabot-core/pull/10597 |
+| NuGet | nuget_install_dotnet_sdks | true/false | /~https://github.com/dependabot/dependabot-core/pull/11090 |
+| Python| python_3_8_deprecation_warning | true/false | /~https://github.com/dependabot/dependabot-core/pull/11166 |
+| Python| python_3_8_unsupported_error | true/false | /~https://github.com/dependabot/dependabot-core/pull/11166 |
 
 > [!NOTE]
 > Dependabot experiment names are not [publicly] documented and these may be out-of-date at the time of reading. To find the latest list of experiments, search the `dependabot-core` GitHub repository using queries like ["enabled?(x)"](/~https://github.com/search?q=repo%3Adependabot%2Fdependabot-core+%2Fenabled%5CW%5C%28.*%5C%29%2F&type=code) and ["options.fetch(x)"](/~https://github.com/search?q=repo%3Adependabot%2Fdependabot-core+%2Foptions%5C.fetch%5C%28.*%2C%2F&type=code). 

extension/tasks/dependabotV2/utils/dependabot/experiments.ts

@@ -7,13 +7,24 @@ export const DEFAULT_EXPERIMENTS: Record<string, string | boolean> = {
   'proxy-cached': true,
   'move-job-token': true,
   'dependency-change-validation': true,
+  'nuget-install-dotnet-sdks': true,
   'nuget-native-analysis': true,
   'nuget-use-direct-discovery': true,
   'enable-file-parser-python-local': true,
+  'npm-fallback-version-above-v6': true,
+  'npm-v6-deprecation-warning': true,
+  'npm-v6-unsupported-error': true,
+  'python-3-8-deprecation-warning': true,
+  'python-3-8-unsupported-error': true,
   'lead-security-dependency': true,
   // NOTE: 'enable-record-ecosystem-meta' is not currently implemented in Dependabot-CLI.
   //       This experiment is primarily for GitHub analytics and doesn't add much value in the DevOps implementation.
   //       See: /~https://github.com/dependabot/dependabot-core/pull/10905
   // TODO: Revsit this if/when Dependabot-CLI supports it.
   //'enable-record-ecosystem-meta': true,
+  'enable-shared-helpers-command-timeout': true,
+  'enable-fix-for-pnpm-no-change-error': true,
+  'enable-engine-version-detection': true,
+  'avoid-duplicate-updates-package-json': true,
+  'allow-refresh-for-existing-pr-dependencies': true,
 };