fix: nox system-3.9 run

Author: shuoweil

noxfile.py

@@ -308,6 +308,7 @@ def mypy(session):
 
 
 def install_systemtest_dependencies(session, install_test_extra, *constraints):
+    session.run("pip", "install", "--upgrade", "pip")
     # Use pre-release gRPC for system tests.
     # Exclude version 1.49.0rc1 which has a known issue.
     # See https://github.com/grpc/grpc/pull/30642

setup.py

@@ -57,7 +57,6 @@
     # 25.20.0 introduces this fix https://github.com/TobikoData/sqlmesh/issues/3095 for rtrim/ltrim.
     "sqlglot >=25.20.0",
     "tabulate >=0.9",
-    "ipywidgets >=7.7.1",
     "humanize >=4.6.0",
     "matplotlib >=3.7.1",
     "db-dtypes >=1.4.2",
@@ -90,6 +89,7 @@
     # install anywidget for SQL
     "anywidget": [
         "anywidget>=0.9.18",
+        "ipywidgets>=7.7.1",
         "traitlets>=5.0.0",
     ],
 }