feat(release-plz): added contributors to changelog (#24)

The generated changelog should now include the author who made the
change.

Closes #22

.github/release-plz.toml

@@ -0,0 +1,22 @@
+[changelog]
+body = """
+
+## [{{ version | trim_start_matches(pat="v") }}]\
+    {%- if release_link -%}\
+        ({{ release_link }})\
+    {% endif %} \
+    - {{ timestamp | date(format="%Y-%m-%d") }}
+{% for group, commits in commits | group_by(attribute="group") %}
+### {{ group | upper_first }}
+    {% for commit in commits %}
+        - {%- if commit.scope %} *({{commit.scope}})* {%- endif -%} \
+        {%- if commit.breaking %} [**breaking**] {%- endif %} \
+        {{ commit.message -}} \
+        {{- self::username(commit=commit) }}
+    {% endfor -%}
+{% endfor %}
+
+{%- macro username(commit) -%}
+    {% if commit.remote.username %} by @{{ commit.remote.username }} {%- endif -%}
+{%- endmacro %}
+"""

.github/workflows/release-plz.yaml

@@ -23,6 +23,8 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
       - name: Run release-plz
         uses: MarcoIeni/[email protected]
+        with:
+          config: .github/release-plz.toml
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}