Revert "Pin Aer to 0.9.1 in CI (#7421)" (#7427)

This reverts commit 1ecd16a.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.github/workflows/randomized_tests.yml

@@ -19,7 +19,7 @@ jobs:
           pip install -U -r requirements-dev.txt coveralls -c constraints.txt
           pip install -c constraints.txt -e .
           pip install "qiskit-ibmq-provider" -c constraints.txt
-          pip install "qiskit-aer==0.9.1"
+          pip install "qiskit-aer"
       - name: Run randomized tests
         run: make test_randomized
       - name: Create comment on failed test run

azure-pipelines.yml

@@ -187,7 +187,7 @@ stages:
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             python setup.py sdist
             pip install -U -c constraints.txt dist/qiskit-terra*.tar.gz
-            pip install -U "cplex" "qiskit-aer==0.9.1" "z3-solver" -c constraints.txt
+            pip install -U "cplex" "qiskit-aer" "z3-solver" -c constraints.txt
             mkdir -p /tmp/terra-tests
             cp -r test /tmp/terra-tests/.
             cp .stestr.conf /tmp/terra-tests/.
@@ -283,7 +283,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -U -c constraints.txt -e .
-            pip install -U "qiskit-aer==0.9.1" -c constraints.txt
+            pip install -U "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |
@@ -381,7 +381,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -U -c constraints.txt -e .
-            pip install -U "qiskit-aer==0.9.1" -c constraints.txt
+            pip install -U "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
             pip check
           displayName: 'Install dependencies'
@@ -621,7 +621,7 @@ stages:
             source test-job/bin/activate
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -U -c constraints.txt -e .
-            pip install -U "qiskit-aer==0.9.1" "z3-solver" -c constraints.txt
+            pip install -U "qiskit-aer" "z3-solver" -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz
             pip check
@@ -770,7 +770,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" "qiskit-aer==0.9.1" "z3-solver" "qiskit-ignis" "matplotlib>=3.3.0" sphinx nbsphinx sphinx_rtd_theme cvxpy -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" "z3-solver" "qiskit-ignis" "matplotlib>=3.3.0" sphinx nbsphinx sphinx_rtd_theme cvxpy -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz pandoc
             pip check

tox.ini

@@ -55,7 +55,7 @@ setenv =
   PYTHON=coverage3 run --source qiskit --parallel-mode
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/requirements-dev.txt
-       qiskit-aer==0.9.1
+       qiskit-aer
 commands =
   stestr run {posargs}
   coverage3 combine