Update package version and Poetry-based publishing workflow

- Bump version to 0.4.0 in pyproject.toml
- Modify GitHub Actions workflow to use Poetry for package building and publishing
- Replace manual pip build process with Poetry build commands
- Streamline package installation and build steps

Author: howethomas

.github/workflows/python-publish.yml

@@ -26,12 +26,14 @@ jobs:
       uses: actions/setup-python@v3
       with:
         python-version: '3.x'
-    - name: Install dependencies
+    - name: Install Poetry
       run: |
-        python -m pip install --upgrade pip
-        pip install build
-    - name: Build package
-      run: python -m build
+        curl -sSL https://install.python-poetry.org | python -
+        export PATH="$HOME/.local/bin:$PATH"
+    - name: Install dependencies with Poetry
+      run: poetry install --no-root
+    - name: Build package with Poetry
+      run: poetry build
     - name: Publish package
       uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
       with:

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "vcon"
-version = "0.3.10"
+version = "0.4.0"
 description = "The vCon library"
 authors = ["Thomas McCarthy-Howe <ghostofbasho@gmail.com>"]
 license = "MIT"