Try fixing the binder

Author: martinRenou

binder/environment.yml

@@ -8,5 +8,3 @@ dependencies:
   - yarn
   - pip
   - wheel
-  - pip:
-    - jupyterlab ==3.1.0-alpha.10

binder/postBuild

@@ -15,6 +15,7 @@ from pathlib import Path
 
 ROOT = Path.cwd()
 
+
 def _(*args, **kwargs):
     """ Run a command, echoing the args
 
@@ -26,6 +27,7 @@ def _(*args, **kwargs):
         print("\nERROR", return_code, " ".join(args))
         sys.exit(return_code)
 
+
 # verify the environment is self-consistent before even starting
 _(sys.executable, "-m", "pip", "check")