minor #755 chore: commit yarn.lock (Kocal)

This PR was merged into the 2.x branch.

Discussion
----------

chore: commit yarn.lock

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

As discussed with `@weaverryan` on Slack, we will now commit the `yarn.lock` to prevent the same issue than symfony/ux#616 (comment) (2nd part).

Commits
-------

c18e9f20 chore: commit yarn.lock

.github/workflows/test.yaml

@@ -31,7 +31,7 @@ jobs:
                   key: ${{ runner.os }}-yarn-${{ hashFiles('**/package.json') }}
                   restore-keys: |
                       ${{ runner.os }}-yarn-
-            - run: yarn
+            - run: yarn --frozen-lockfile
             - run: yarn check-lint
             - run: yarn check-format
 
@@ -50,7 +50,7 @@ jobs:
                   key: ${{ runner.os }}-yarn-${{ hashFiles('**/package.json') }}
                   restore-keys: |
                       ${{ runner.os }}-yarn-
-            - run: yarn && yarn build
+            - run: yarn --frozen-lockfile && yarn build
             - name: Check if js dist files are current
               id: changes
               run: |
@@ -259,5 +259,5 @@ jobs:
                   key: ${{ runner.os }}-yarn-${{ hashFiles('**/package.json') }}
                   restore-keys: |
                       ${{ runner.os }}-yarn-
-            - run: yarn
+            - run: yarn --frozen-lockfile
             - run: yarn test

.gitignore

@@ -1,7 +1,6 @@
 .doctor-rst.cache
 .php-cs-fixer.cache
 node_modules
-yarn.lock
 yarn-error.log
 /composer.lock
 /vendor