(refactor): move lint -> fixtures/lint, and the test out

- because everything other than the test was indeed a fixture, and it's
  better to properly specify those as such for clarity
  - and consistency with the other tests

(format): fix some linting issues in tsdx-lint.test.js
- it's now no longer ignored by the lint script (which ignores the
  whole directory due to the fixtures)

package.json

@@ -24,7 +24,7 @@
     "prepare": "tsc -p tsconfig.json",
     "build": "tsc -p tsconfig.json",
     "lint": "yarn build && yarn lint:post-build",
-    "lint:post-build": "node dist/index.js lint src test --ignore-pattern 'test/e2e/lint'",
+    "lint:post-build": "node dist/index.js lint src test --ignore-pattern 'test/e2e/fixtures/lint'",
     "test": "yarn build && yarn test:post-build",
     "test:post-build": "node dist/index.js test",
     "start": "tsc -p tsconfig.json --watch",

test/e2e/fixtures/README.md

@@ -3,3 +3,4 @@
 - `build-default` focuses on our zero config defaults
 - `build-invalid` lets us check what happens when we have invalid builds due to type errors
 - `build-withTsconfig` lets us check that `tsconfig.json` options are correctly used
+- `lint` lets us check that lint errors are correctly detected

test/e2e/lint/tsdx-lint.test.js → test/e2e/tsdx-lint.test.js

@@ -1,17 +1,13 @@
-/**
- * @jest-environment node
- */
-'use strict';
-
 const shell = require('shelljs');
-const util = require('../../utils/fixture');
+
+const util = require('../utils/fixture');
 
 shell.config.silent = true;
 
 const testDir = 'e2e';
 const stageName = 'stage-lint';
 
-const lintDir = `test/${testDir}/lint`
+const lintDir = `test/${testDir}/fixtures/lint`;
 
 describe('tsdx lint', () => {
   it('should fail to lint a ts file with errors', () => {