Remove postcss-reporter package

[ybiquitous]

Which issue, if any, is this issue related to?

Related to #2454

Is there anything in the PR that needs further explanation?

This change removes the postcss-reporter package and reduces the dependencies.
As you see the changed package-lock.json, this package depends on:

• chalk
• lodash
• log-symbols
• postcss

See also #2454 (comment)

We've used only the tiny utility function getLocation() in the package.
This function just returns an object with the line and column property in our project, so I think we can replace it with a simple code.

https://github.com/postcss/postcss-reporter/blob/f01a601ea2cd41d626e561969d66a765b3afcb2d/lib/util.js#L4-L13

[ybiquitous]

[note] The message variable is a StylelintWarning, so checking null seems needless:

stylelint/types/stylelint/index.d.ts

Lines 186 to 188 in b1187b6

	export type StylelintWarning = {
	line: number;
	column: number;

Suggested change

	line ? line.toString() : '',
	column ? column.toString() : '',
	line.toString(),
	column.toString(),

But, if changing it, the following test fails:

 FAIL  lib/formatters/__tests__/verboseFormatter.test.js
  stringFormatter
    ✓ outputs no warnings (3 ms)
    ✓ outputs one warnings (of severity 'error') (6 ms)
    ✓ outputs 0 stdout column (1 ms)
    ✓ outputs less than 80 stdout column (1 ms)
    ✓ outputs two of the same warnings of 'error' and one of 'warning' across two files (3 ms)
    ✕ outputs lineless syntax error
    ✓ outputs one ignored file

  ● stringFormatter › outputs lineless syntax error

    TypeError: Cannot read property 'toString' of undefined

      140 | 		 */
      141 | 		const row = [
    > 142 | 			line.toString(),
          | 			     ^
      143 | 			column.toString(),
      144 | 			symbols[severity]
      145 | 				? chalk[/** @type {'blue' | 'red' | 'yellow'} */ (levelColors[severity])](symbols[severity])

In this case, the failed test case seems wrong (should have lines and columns?), but I'm not confident whether I should fix it: 😓

stylelint/lib/formatters/__tests__/verboseFormatter.test.js

Lines 211 to 217 in b1187b6

	warnings: [
	{
	rule: 'SyntaxError',
	severity: 'error',
	text: 'Unexpected foo',
	},
	],

[jeddy3]

Thanks, LGTM.

In this case, the failed test case seems wrong (should have lines and columns?), but I'm not confident whether I should fix it

Perhaps we leave for now and revisit.

[m-allanson]

Nice!

In this case, the failed test case seems wrong

I agree, the test case seems wrong. I also agree with @jeddy3, let's leave it in for now.

[ybiquitous]

@jeddy3 @m-allanson Thanks for the review. As you said, it seems good to leave it now. 👍