fix(test): specify dev deps in pyproject.toml

Author: chaimleib

.github/workflows/build.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        if [ -f pyproject.toml ]; then pip install flake8 '.[test]'; fi
+        if [ -f pyproject.toml ]; then pip install '.[dev]'; fi
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

pyproject.toml

@@ -38,3 +38,9 @@ classifiers = [
 [project.urls]
 Homepage = "https://github.com/chaimleib/intervaltree"
 Issues = "https://github.com/chaimleib/intervaltree/issues"
+
+[project.optional-dependencies]
+dev = [
+        "flake8",
+        "pytest",
+]