[Snyk] Security upgrade karma from 3.1.4 to 6.0.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • actioncable/package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	768/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JS-ENGINEIO-1056749	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: karma

The new version differs by 200 commits.

• 3653caf chore(release): 6.0.0 [skip ci]
• 04a811d fix(ci): abandon browserstack tests for Safari and IE (Ignore *.gz files that are generated from 'rake assets:precompile' rails/rails#3615)
• 4bf90f7 feat(client): update banner with connection, test status, ping times (AS::Callbacks::Callback#_compile_option refactored rails/rails#3611)
• 68c4a3a chore(test): run client tests without grunt wrapper (Requests for packaged assets sweep the flash in development rails/rails#3604)
• fec972f fix(middleware): catch errors when loading a module (Make the flash sweeper ignore requests for assets rails/rails#3605)
• 3fca456 fix(server): clean up close-server logic (AS::Callbacks.__run_keyed_callback: remove unused cache rails/rails#3607)
• 1c9c2de fix(test): mark all second connections reconnects (Fix a tiny typo in custom validators documentation rails/rails#3598)
• 87f7e5e chore(license): Update copyright notice to 2020 [ci skip] (Fix trouble using :subdomain in development environment when using numeric addresses. rails/rails#3568)
• e6b045f chore(deps): npm audit fix the package-lock.json (Modify change_table to remove the need for the block argument rails/rails#3603)
• 3c649fa chore(build): remove obsolete Grunt tasks (add_index allows too long of a index name for mysql rails/rails#3602)
• 8997b74 fix(test): clear up clearContext (fixed example code indentation rails/rails#3597)
• fe0e24a chore(build): unify client bundling scripts (Checking the arity of the block passed to create_table rails/rails#3600)
• 1a65bf1 feat(server): remove deprecated static methods ([ActiveRecord] Add a condition on the join table make multiple SHOW TABLES calls rails/rails#3595)
• fb76ed6 chore(test): remove usage of deprecated buffer API (Certain file name does not compile rails/rails#3596)
• 35a5842 feat(server): print stack of unhandledrejections (AS::Callbacks._define_runner better abstraction rails/rails#3593)
• 4a8178f fix(client): do not reset karmaNavigating in unload handler (Fixed error with 'rails generate new plugin' where the .gitignore was not rails/rails#3591)
• 603bbc0 feat(cli): error out on unexpected options or parameters (Extend IRB right before starting IRB to remove dependency on IRB from Rails::Application rails/rails#3589)
• 7a3bd55 feat: remove support for running dart code in the browser (Fix and simplify highlight regexp rails/rails#3592)
• 1b9e1de fix(deps): bump socket-io to v3 (table name and colums name uppercased are not recongnized rails/rails#3586)
• 3fed0bc fix(cve): update yargs to 16.1.1 to fix cve-2020-7774 in y18n (Remove j alias for ERB::Util.json_escape rails/rails#3578)
• f819fa8 fix(cve): update ua-parser-js to 0.7.23 to fix CVE-2020-7793 (Rails 3.1 PostgreSQL seeding schema rails/rails#3584)
• 05dc288 fix(context): do not error when karma is navigating (Warnings removed. rails/rails#3565)
• e5086fc docs: clarify `browser_complete` vs `run_complete`
• ead31cd chore(release): 5.2.3 [skip ci]

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