Add support for JupyterLab 4

.copier-answers.yml

@@ -0,0 +1,14 @@
+# Changes here will be overwritten by Copier; NEVER EDIT MANUALLY
+_commit: v4.2.1
+_src_path: https://github.com/jupyterlab/extension-template
+author_email: [email protected]
+author_name: Frederic Collonval
+has_binder: true
+has_settings: true
+kind: server
+labextension_name: jupyterlab-search-replace
+project_short_description: Search and replace across files
+python_name: jupyterlab_search_replace
+repository: https://github.com/jupyterlab-contrib/search-replace.git.git
+test: true
+

.github/workflows/binder-on-pr.yml

@@ -0,0 +1,14 @@
+name: Binder Badge
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  binder:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: jupyterlab/maintainer-tools/.github/actions/binder-link@v1
+        with:
+          github_token: ${{ secrets.github_token }}