Fix tox.ini (backport #9276) (#9277)

* fix tox.ini (#9276)

(cherry picked from commit e70ce50)

# Conflicts:
#	tox.ini

* Fix merge conflict

* pin ipywidgets (#9272)

(cherry picked from commit b4f4c34)

Co-authored-by: Takashi Imamichi <31178928+t-imamichi@users.noreply.github.com>
Co-authored-by: Jake Lishman <jake.lishman@ibm.com>
Co-authored-by: Takashi Imamichi <imamichi@jp.ibm.com>

constraints.txt

@@ -18,3 +18,7 @@ jinja2==3.0.3
 # a seaborn import. This pin can be removed when compatibility with those
 # packages is fixed
 jupyter-core==4.11.2
+
+# ipywidgets 8.0.3 started emitting deprecation warnings via a seaborn import.
+# This pin can be removed when compatibility with those packages is fixed.
+ipywidgets<8.0.3

requirements-dev.txt

@@ -3,7 +3,7 @@ hypothesis>=4.24.3
 python-constraint>=1.4
 ipython<7.22.0
 ipykernel<5.5.2
-ipywidgets>=7.3.0
+ipywidgets>=7.3.0,<8.0.3
 jupyter
 matplotlib>=3.3
 pillow>=4.2.1

tox.ini

@@ -14,7 +14,7 @@ setenv =
   QISKIT_SUPRESS_PACKAGING_WARNINGS=Y
   QISKIT_TEST_CAPTURE_STREAMS=1
   QISKIT_PARALLEL=FALSE
-passenv = RAYON_NUM_THREADS OMP_NUM_THREADS QISKIT_PARALLEL RUST_BACKTRACE SETUPTOOLS_ENABLE_FEATURES
+passenv = RAYON_NUM_THREADS, OMP_NUM_THREADS, QISKIT_PARALLEL, RUST_BACKTRACE, SETUPTOOLS_ENABLE_FEATURES
 deps = setuptools_rust  # This is work around for the bug of tox 3 (see #8606 for more details.)
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/requirements-dev.txt