Switch build system from Hatchling to PDM

pyproject.toml

@@ -50,6 +50,8 @@ Homepage = "https://github.com/pelican-plugins/minify"
 [project.optional-dependencies]
 markdown = ["markdown>=3.4"]
 
+[tool.pdm]
+
 [tool.pdm.dev-dependencies]
 lint = [
     "black>=23.7.0",
@@ -63,6 +65,15 @@ test = [
     "pytest-sugar>=0.9.7",
 ]
 
+[tool.pdm.build]
+source-includes = [
+    "CHANGELOG.md",
+    "CONTRIBUTING.md",
+    "DEVELOPMENT.md",
+]
+includes = ["pelican/"]
+excludes = ["tasks.py"]
+
 [tool.autopub]
 project-name = "Minify"
 git-username = "botpub"