Merge pull request #331 from ds4dm/maintenance-notice

Maintenance only notice

Author: AntoinePrv

README.rst

@@ -1,3 +1,9 @@
+⚠️ **Warning** ⚠️
+
+*Ecole is looking for a new home.*
+*It is not being actively developed, only critical issues will be investigated.*
+
+
 .. image:: https://raw.githubusercontent.com/ds4dm/ecole/master/docs/_static/images/ecole-logo.svg
    :target: https://www.ecole.ai
    :alt: Ecole logo

dev/conda.yaml

@@ -32,7 +32,7 @@ dependencies:
   # C++ dev tools
   - clang-tools=11
   - ccache
-  - catch2
+  - catch2 < 3.0
   - cli11
   # Python dev tools
   - pip