BLD: try only upper pinning ipython, keep numpy pinned

Author: tangkong

.github/workflows/standard.yml

@@ -21,7 +21,7 @@ jobs:
       conda-testing-extras: "ipython=8.4.0"
       # Extras to be installed only for pip-based testing:
       # Set numpy<2 for now, remove when xraylib updates
-      pip-testing-extras: "ipython==8.4.0 numpy<2"
+      pip-testing-extras: "numpy<2"
       # System packages to be installed only for conda-based testing:
       conda-system-packages: ""
       # System packages to be installed only for pip-based testing:

requirements.txt

@@ -3,7 +3,7 @@ bluesky>=1.8.0
 coloredlogs>=15.0.0
 cookiecutter>=1.7.0
 happi>=1.9.0
-ipython>=8.26.0
+ipython<=8.26.0
 jinja2>=2.11.0
 lightpath>=1.0.1
 matplotlib>=3.4.0