Migrate from poetry install to poetry sync

.github/workflows/pages.yml

@@ -23,6 +23,6 @@ jobs:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: poetry
       - name: Install Nox and doc dependencies
-        run: poetry install --only nox,docs
+        run: poetry sync --only nox,docs
       - name: Publish Docs
         run: poetry run nox -s docs_github_pages

.github/workflows/python.yml

@@ -23,7 +23,7 @@ jobs:
           # https://github.com/actions/setup-python#caching-packages-dependencies
           cache: poetry
       - name: Install Nox
-        run: poetry install --only nox
+        run: poetry sync --only nox
       - name: Test with Nox
         run: poetry run nox -s test-${{ matrix.python-version }}
   quality:
@@ -45,7 +45,7 @@ jobs:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: poetry
       - name: Install Nox and group dependencies
-        run: poetry install --only nox,${{ matrix.job.poetry-groups }}
+        run: poetry sync --only nox,${{ matrix.job.poetry-groups }}
       - name: Test with Nox
         run: poetry run nox -s ${{ matrix.job.nox-session }}
   poetry-check:

Dockerfile

@@ -46,9 +46,7 @@ ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
 COPY pyproject.toml poetry.lock ./
 
 # Don't install the package itself with Poetry because it will install it as an editable install.
-# TODO: Improve this when non-editable `poetry install` is supported in Poetry.
-#    https://github.com/python-poetry/poetry/issues/1382
-RUN poetry install --only main --no-root
+RUN poetry sync --only main --no-root
 
 # Copy in source files.
 COPY README.md ./