fix: fix windows-lint CI job

[astone123]

The windows-lint CI job has been failing as of recent because of different line endings between Windows and Unix operating systems. We have configured Git to replace line endings in JSON files, but not in .eslintrc files (which use JSON).

So, when Circle checks out the code on Windows, the line endings are CRLF rather than LF. This causes ESLint to fail when linting .eslintrc files (which we only do in npm/eslint-plugin-dev/test) because it is expecting different line endings.

This PR adds **/.eslintrc files to the .gitattributes configuration so that the line endings in those files are always LF, no matter the operating system. I also fixed the other warnings that were being logged in the lint job just to clean up some noise.

Example failing windows-lint job
Passing windows-lint job on most recent commit

I also added --concurrency 2 to the yarn lint command so that we don't run out of memory in CI (which has been happening recently in our linux-lint runs)

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[astone123]

This is the change that makes the windows-lint job pass again

[cypress]

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Test summary

438 • 0 • 10 • 0 • 1

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Run details

Project	cypress
Status	Passed
Commit	375f736
Started	Nov 22, 2022 5:39 PM
Ended	Nov 22, 2022 5:51 PM
Duration	11:48 💡
OS	Linux Debian -
Browser	Chrome 106

View run in Cypress Dashboard ➡️

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Flakiness

	cypress/e2e/specs_list_latest_runs.cy.ts		1
1	App/Cloud Integration - Latest runs and Average duration > when no runs are recorded > shows placeholders for all visible specs

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[lmiller1990]

Was this intended?

[astone123]

Yeah, this was to resolve one of the warnings that was showing up during linting just to clean some things up. It looks like ESLint requires a default for Vue props the way we have it configured, or else it warns.

[lmiller1990]

Nice

[emilyrohrbough]

why don't we want to lint the tsconfig?

[astone123]

I added these ignore files because there's a plugin that is already skipping these files and when it does it logs a warning. Wanted to clean those up

/root/cypress/packages/graphql/tsconfig.json
  0:0  warning  [@cypress/eslint-plugin-json]: Skipping file due to "json/json-with-comments-files" setting: 
  ["**/tsconfig.json", ".vscode/**"]
To remove this warning add "tsconfig.json" to your `.eslintignore` file