Pin to Poetry 1.1

After creating numerous problems for maintainers by cramming breaking
changes into patch releases, Poetry finally released a minor version,
1.2, which should probably have been a major version.

In order to upgrade, each project will need to update its pyproject.toml
(to support groups), update any references to the install script (which
has been moved twice), and make several other associated changes.

This commit will set an upper bound on the `pipx install poetry` command
to avoid upgrading to Poetry 1.2.

br3ndonland/inboard#36
br3ndonland/inboard#44
br3ndonland/inboard#47
https://python-poetry.org/blog/announcing-poetry-1.2.0/

scripts/strap-after-setup.sh

@@ -18,7 +18,7 @@ fi
 
 ### Install Poetry
 if command -v pipx &>/dev/null && ! command -v poetry &>/dev/null; then
-  pipx install poetry
+  pipx install "poetry>=1.1,<1.2"
 else
   echo "Skipping Poetry install."
 fi