Make code Python 3.8+ compatible and bump version to 0.0.3

The `|` operator in type hints was introduced in 3.10, so we use
`typing.Optional` instead.

Also run tests for all Python version >=3.8.

.github/workflows/ci.yaml

@@ -12,3 +12,13 @@ on:
 jobs:
   tests:
     uses: ./.github/workflows/tests.yaml
+
+  check_success:
+    runs-on: ubuntu-latest
+    needs:
+    - tests
+    steps:
+    - name: Decide whether the needed jobs succeeded or failed
+      uses: re-actors/alls-green@release/v1
+      with:
+        jobs: ${{ toJSON(needs) }}

.github/workflows/tests.yaml

@@ -7,12 +7,17 @@ on:
 jobs:
   tests:
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     steps:
     - uses: actions/checkout@v4
 
     - uses: actions/setup-python@v5
       with:
-        python-version-file: "pyproject.toml"
+        python-version: ${{ matrix.python_version }}
 
     - run: python3 -m pip install poetry
 

RobotmkLibrary/__init__.py

@@ -1,10 +1,11 @@
 # pylint: disable=invalid-name, missing-module-docstring
 import logging
+from typing import Optional
 
 
 def monitor_subsequent_keyword_runtime(  # pylint: disable=missing-function-docstring
     *,
-    discover_as: str | None = None,
+    discover_as: Optional[str] = None,
 ) -> None:
     logging.info(
         "The subsequent keyword will be discovered in Checkmk using its own name"

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "robotframework-robotmklibrary"
-version = "0.0.2"
+version = "0.0.3"
 description = "A Robot Framework keyword library intended to be used with Robotmk."
 authors = ["Jörg Herbel <joerg.herbel@checkmk.com>"]
 packages = [
@@ -9,7 +9,7 @@ packages = [
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.8"  # "^3" would be sufficient for our code, but fails to resolve
+python = "^3.8"  # anything lower than 3.8 fails to resolve
 
 [tool.poetry.group.dev]
 optional = true