📣 Start managing the changelog with towncrier

This PR includes a workflow that validates that future PRs include
a changelog entry (unless the `skip-changelog` label is present on the
PR, or the PR is a dependabot PR).

Use 'poetry run towncrier create` to create entries for the changelog.

pyproject.toml

@@ -40,6 +40,7 @@ requests = "*"
 coverage = ">=6.5,<8.0"
 httpx = "*"
 tox = "^4.5.1"
+towncrier = "^22.12.0"
 
 [tool.poetry.group.distributing]
 optional = true
@@ -76,6 +77,16 @@ strict_concatenate = true
 module = "examples.*.main"
 ignore_errors = true
 
+[tool.towncrier]
+directory = "changelog.d"
+filename = "CHANGELOG.md"
+package = "fastapi_cache"
+start_string = "<!-- towncrier release notes start -->\n"
+underlines = ["", "", ""]
+template = "changelog.d/changelog_template.jinja"
+title_format = "## [{version}](https://github.com/long2ice/fastapi-cache/tree/{version}) - {project_date}"
+issue_format = "[#{issue}](https://github.com/long2ice/fastapi-cache/issues/{issue})"
+
 [tool.pyright]
 strict = ["fastapi_cache", "tests"]
 pythonVersion = "3.7"