feat: update template keepachangelog

changes:
* capitalized commit subject
* show author name for each commit
* sort commits by date
* unique commit subject to keep notable

src/git_changelog/templates/keepachangelog/commit.md

@@ -1,4 +1,4 @@
-- {{ commit.subject }} ([{{ commit.hash|truncate(7, True, '') }}]({{ commit.url }})).
+- {{ commit.subject|capitalize }} ([{{ commit.hash|truncate(7, True, '') }}]({{ commit.url }}) by {{ commit.author_name }}).
 {%- if commit.text_refs.issues_not_in_subject %} Related issues/PRs: {% for issue in commit.text_refs.issues_not_in_subject -%}
 {{ issue.ref }}{% if not loop.last %}, {% endif -%}
 {%- endfor -%}{%- endif -%}

src/git_changelog/templates/keepachangelog/section.md

@@ -1,4 +1,4 @@
 ### {{ section.type or "Misc" }}
-{% for commit in section.commits|sort(attribute='subject') -%}
+{% for commit in section.commits|sort(attribute='author_date',reverse=true)|unique(attribute='subject') -%}
 {% include 'commit.md' with context %}
 {% endfor %}