Backport PR #421 on branch 3.x (Update event schema version type) (#443)

* Backport PR #421: Update event schema version type

* Bump jupyter_server to >=2.15.0<3.0.0

---------

Co-authored-by: David Brochart <[email protected]>
Co-authored-by: Nicolas Brichet <[email protected]>

Author: 3 people

projects/jupyter-server-ydoc/jupyter_server_ydoc/events/awareness.yaml

@@ -1,6 +1,6 @@
 "$id": https://schema.jupyter.org/jupyter_collaboration/awareness/v1
 "$schema": "http://json-schema.org/draft-07/schema"
-version: 1
+version: "1"
 title: Collaborative awareness events
 personal-data: true
 description: |

projects/jupyter-server-ydoc/jupyter_server_ydoc/events/fork.yaml

@@ -1,6 +1,6 @@
 "$id": https://schema.jupyter.org/jupyter_collaboration/fork/v1
 "$schema": "http://json-schema.org/draft-07/schema"
-version: 1
+version: "1"
 title: Collaborative fork events
 personal-data: true
 description: |

projects/jupyter-server-ydoc/jupyter_server_ydoc/events/session.yaml

@@ -1,6 +1,6 @@
 "$id": https://schema.jupyter.org/jupyter_collaboration/session/v1
 "$schema": "http://json-schema.org/draft-07/schema"
-version: 1
+version: "1"
 title: Collaborative session events
 personal-data: true
 description: |

projects/jupyter-server-ydoc/pyproject.toml

@@ -28,7 +28,7 @@ authors = [
     { name = "Jupyter Development Team", email = "[email protected]" },
 ]
 dependencies = [
-    "jupyter_server>=2.11.1,<3.0.0",
+    "jupyter_server>=2.15.0,<3.0.0",
     "jupyter_ydoc>=2.1.2,<4.0.0,!=3.0.0,!=3.0.1",
     "pycrdt",
     "pycrdt-websocket>=0.15.0,<0.16.0",
@@ -42,7 +42,7 @@ dynamic = ["version"]
 test = [
     "coverage",
     "dirty-equals",
-    "jupyter_server[test]>=2.4.0",
+    "jupyter_server[test]>=2.15.0",
     "jupyter_server_fileid[test]",
     "pytest>=7.0",
     "pytest-cov",

ui-tests/playwright.config.js

@@ -20,7 +20,7 @@ module.exports = {
   },
   expect: {
     toMatchSnapshot: {
-      maxDiffPixelRatio: 0.0001
+      maxDiffPixelRatio: 0.01
     }
   }
 };