Pin poetry to 1.2

Author: edoardopirovano

python-setup/install_tools.ps1

@@ -9,5 +9,6 @@ py -2 -m pip install --user 'virtualenv<20.11'
 py -3 -m pip install --user 'virtualenv<20.11'
 
 # poetry 1.0.10 has error (https://github.com/python-poetry/poetry/issues/2711)
-py -3 -m pip install --user poetry!=1.0.10
+# We aren't compatible with poetry 1.2
+py -3 -m pip install --user "poetry!=1.0.10,>=1.1,<1.2"
 py -3 -m pip install --user pipenv

python-setup/install_tools.sh

@@ -25,7 +25,8 @@ python3 -m pip install --user 'virtualenv<20.11'
 #     LGTM_PYTHON_SETUP_VERSION=The currently activated Python version 2.7.18 is not supported by the project (^3.5). Trying to find and use a compatible version. Using python3 (3.8.2) 3
 
 # poetry 1.0.10 has error (https://github.com/python-poetry/poetry/issues/2711)
-python3 -m pip install --user poetry!=1.0.10
+# We aren't compatible with poetry 1.2
+python3 -m pip install --user "poetry!=1.0.10,>=1.1,<1.2"
 python3 -m pip install --user pipenv
 
 if command -v python2 >/dev/null 2>&1; then