Fix changelog generation and backfill entries

Change the git log --grep pattern from '^.*[0-9])$' (which matches
squash-merge titles like "Feature (#123)") to '--grep=Merge pull
request #' (which matches the actual merge commit format this repo
uses). Backfill changelog entries for all versions.

Author: dmarticus

.github/workflows/label-version-bump.yml

@@ -87,7 +87,7 @@ jobs:
                   BASE_COMMIT: ${{ github.event.pull_request.base.ref }}
               run: |
                   CHANGELOG_HEADING="## $NEW_VERSION - $(date --iso-8601)"
-                  CHANGELOG_POINTS="$(git log v$OLD_VERSION..$BASE_COMMIT --pretty=format:%s --grep='^.*[0-9])$' | sed -e 's/^/- /')"
+                  CHANGELOG_POINTS="$(git log v$OLD_VERSION..$BASE_COMMIT --pretty=format:%s --grep='Merge pull request #' | sed -e 's/^/- /')"
                   mv CHANGELOG.md CHANGELOG.old.md
                   echo -e "$CHANGELOG_HEADING\n\n$CHANGELOG_POINTS\n\n$(cat CHANGELOG.old.md)" > CHANGELOG.md
                   rm CHANGELOG.old.md

CHANGELOG.md

@@ -1,13 +1,12 @@
 ## 0.4.0 - 2026-02-04
 
+- Add feature flags with local evaluation support (#36)
+- Add group support and anonymous event support (#22)
+- Add global disable function (#20)
+- Add global client functions (#19)
+- Add timestamp setter (#30)
 
+## 0.2.0
 
-## 0.2.6 - 2025-01-08
-
-
-
-## 0.2.5 - 2025-01-08
-
-
-
-##  - 2025-01-08
+- Add generic properties (#1)
+- Derive Debug, PartialEq, and Eq on Event