feat: stop treating same head and review SHA as force (#300)

After some testing, I noticed that when the base branch is merged/PR is
rebased **cleanly**, Github API changes the associated SHA of PR review
to the latest commit. However, if merge/rebase is **not clean**, and
there are some changes, the associated SHA stays the same.
That means that GitHub is completely responsible for correctly
identifying whether there were some changes since the last review, and
this action can't distinguish between a clean merge/force push and a
re-run of the action.

So to prevent unexpected review removals when the base branch is
merged/PR is rebased **cleanly**, this PR removes "PR review dismiss"
for `reviewAssociatedCommit === headCommit` condition.
</br>

BREAKING CHANGE: When `head` SHA and SHA associated with the review are
the same, it is no longer interpreted as force push, and the review is
**not** dismissed.
If the `head` and review SHAs are the same, it's either because there
were no new commits, or because the base branch was merged/PR was
rebased **cleanly**.

Fixes #253

README.md

@@ -50,7 +50,7 @@ jobs:
           app_id: ${{ secrets.MANAGE_REVIEWS_BOT_ID }}
           private_key: ${{ secrets.MANAGE_REVIEWS_BOT_PEM }}
 
-      - uses: balvajs/dismiss-stale-reviews@v1
+      - uses: balvajs/dismiss-stale-reviews@v3
         with:
           token: ${{ steps.get-token.outputs.token }}
 ```

lint-staged.config.js

@@ -1,5 +1,5 @@
 export default {
   '*.{js,ts,json,yml,md,mdx}': filenames =>
     `prettier --write ${filenames.join(' ')}`,
-  '*.{js,ts,json}': () => 'pnpm run package',
+  '*.{js,ts,json}': () => ['pnpm run package', 'git add dist'],
 }

src/calculate-reviews-to-dismiss.ts

@@ -98,13 +98,11 @@ export const calculateReviewToDismiss = async <TReview extends Review>({
           `Considering review from ${author?.login} and file changes between ${review.commit?.oid} (reviewed commit) and ${headCommit} (head commit)`,
         )
 
+        // in case there is no diff because head and review commit matches, skip that review
         if (review.commit?.oid === headCommit) {
           console.log(
-            'The review commit sha is the same as head commit sha and changed files can’t be resolved. This is caused by force-push.',
+            'The review commit sha is the same as head commit sha. That means that there were no changes since the review, or the base branch was merged/rebased cleanly.',
           )
-          isDismissed = true
-          reviewsWithoutHistory.push(review)
-          reviewsToDismiss.push(review)
         } else if (
           !author ||
           // if review author is mentioned directly as an owner of changed files, dismiss their review