Update binder2 (#555)

* Update binder

* Fix gha

* Try using notebook

Author: ianthomas23

.binder/environment.yml

@@ -2,8 +2,8 @@ name: ipympl
 channels:
   - conda-forge
 dependencies:
-  - yarn
-  - numpy
+  - yarn~=3.0
   - jupyterlab~=4.0
-  - retrolab
-  - matplotlib-base>=2.2.2
+  - ipywidgets>=7.6
+  - matplotlib
+  - notebook>=7

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

@@ -15,11 +15,11 @@ jobs:
         script: |
           var PR_HEAD_USERREPO = process.env.PR_HEAD_USERREPO;
           var PR_HEAD_REF = process.env.PR_HEAD_REF;
-          github.issues.createComment({
+          github.rest.issues.createComment({
             issue_number: context.issue.number,
             owner: context.repo.owner,
             repo: context.repo.repo,
-            body: `[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/${PR_HEAD_USERREPO}/${PR_HEAD_REF}?urlpath=retro/notebooks/docs/examples/full-example.ipynb) :point_left: Launch a binder notebook on branch _${PR_HEAD_USERREPO}/${PR_HEAD_REF}_`
+            body: `[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/${PR_HEAD_USERREPO}/${PR_HEAD_REF}?urlpath=notebooks/docs/examples/full-example.ipynb) :point_left: Launch a binder notebook on branch _${PR_HEAD_USERREPO}/${PR_HEAD_REF}_`
           })
       env:
         PR_HEAD_REF: ${{ github.event.pull_request.head.ref }}

README.md

@@ -4,7 +4,7 @@
 [![Latest PyPI version](https://img.shields.io/pypi/v/ipympl?logo=pypi)](https://pypi.python.org/pypi/ipympl)
 [![Latest conda-forge version](https://img.shields.io/conda/vn/conda-forge/ipympl?logo=conda-forge)](https://anaconda.org/conda-forge/ipympl)
 [![Latest npm version](https://img.shields.io/npm/v/jupyter-matplotlib?logo=npm)](https://www.npmjs.com/package/jupyter-matplotlib)
-[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/matplotlib/ipympl/stable?urlpath=retro/notebooks/docs/examples/full-example.ipynb)
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/matplotlib/ipympl/main?urlpath=notebooks/docs/examples/full-example.ipynb)
 [![Gitter](https://img.shields.io/badge/gitter-Join_chat-blue?logo=gitter)](https://gitter.im/jupyter-widgets/Lobby)
 
 Leveraging the Jupyter interactive widgets framework, `ipympl` enables the interactive features of matplotlib in the Jupyter notebook and in JupyterLab.