chore: de-support yarn PnP version 1 BREAKING (#769)

.github/workflows/ci.yml

@@ -142,12 +142,3 @@ jobs:
       #     yarn --version
       #     yarn test:cover
 
-  check-yarn-integration:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
-        with:
-          node-version: ${{env.NODE_LATEST}}
-      - run: npm install
-      - run: npm run test:yarn-pnp

doc/faq.md

@@ -555,6 +555,13 @@ From version 9.21.3 this works automatically. In earlier versions (from 4.14.0)
 you only needed to `yarn-pnp` into _externalModuleResolutionStrategy_ key in
 the config (--init took care of that), but that's not necessary anymore.
 
+As of version 13.0.0 dependency-cruiser does not work with the pnp from
+yarn 1.x.x anymore. The yarn team has done only life cycle management and security
+fixes on that version for several years - but encourages everyone to migrate over
+to yarn 3. Our guess is that everyone who is serious about using yarn pnp has
+already done so long ago. Moreover the old yarn 1 pnp version was holding us
+back from moving on with the nodejs and javascript ecosystem.
+
 </details>
 
 ### Q: dependency-cruiser detected a circular dependency. How can I see (one of the) cycles that dependency-cruiser saw?

package.json

@@ -72,7 +72,7 @@
     "build": "make build",
     "build:clean": "make clean",
     "check": "npm-run-all build lint depcruise test:cover",
-    "check:full": "npm-run-all check test:glob test:yarn-pnp",
+    "check:full": "npm-run-all check test:glob",
     "depcruise": "node ./bin/dependency-cruise.js src bin test configs types tools --config --ignore-known",
     "depcruise:all": "node ./bin/dependency-cruise.js src bin test configs types tools --config",
     "depcruise:baseline": "node ./bin/depcruise-baseline.js src bin test configs types tools",
@@ -122,15 +122,6 @@
     "test:e": "LANG=en_US.UTF-8 mocha --grep \"^\\[[E]\\]\"",
     "test:cover": "LANG=en_US.UTF-8 c8 mocha",
     "test:glob": "set -f && test \"`bin/dependency-cruise.js test/extract/__mocks__/gather-globbing/packages/**/src/**/*.js | grep \"no dependency violations found\"`\" = \"✔ no dependency violations found (6 modules, 0 dependencies cruised)\"",
-    "test:yarn-pnp": "npm-run-all test:yarn-pnp:cleanup test:yarn-pnp:cache-clean test:yarn-pnp:pack test:yarn-pnp:copy test:yarn-pnp:install test:yarn-pnp:version test:yarn-pnp:run test:yarn-pnp:test test:yarn-pnp:cleanup",
-    "test:yarn-pnp:pack": "npm pack",
-    "test:yarn-pnp:copy": "shx cp -r test/integration/yarn-pnp.template test/integration/yarn-pnp.testing-ground",
-    "test:yarn-pnp:install": "cd test/integration/yarn-pnp.testing-ground && yarn && yarn add -D ../../../dependency-cruiser*.tgz",
-    "test:yarn-pnp:version": "cd test/integration/yarn-pnp.testing-ground && yarn dependency-cruise:version",
-    "test:yarn-pnp:run": "cd test/integration/yarn-pnp.testing-ground && yarn dependency-cruise:json",
-    "test:yarn-pnp:test": "cd test/integration/yarn-pnp.testing-ground && yarn test",
-    "test:yarn-pnp:cache-clean": "yarn cache clean",
-    "test:yarn-pnp:cleanup": "shx rm -rf test/integration/yarn-pnp.testing-ground dependency-cruiser*.tgz",
     "test:load": "hyperfine --warmup 3 --runs 30 \"bin/dependency-cruise.js src bin test configs types tools --ignore-known --validate --no-cache --no-progress\"",
     "test:load:short": "hyperfine --warmup 1 --runs 5 \"bin/dependency-cruise.js src bin test configs types tools --ignore-known --validate --no-cache --no-progress\"",
     "test:watch": "mocha --watch --watch-extensions=json --reporter=min test/\\*\\*/\\*.spec.js",