chore: treat minor changes as breaking (#2275)

.github/workflows/pr-lint.yaml

@@ -92,6 +92,14 @@ jobs:
 
             exit 0
           fi
+          # TODO: Remove once v1.0.0 is released.
+          # Minor changes are treated as breaking until v1.0.0 is released.
+          if echo "$AFFECTED_PACKAGES" | grep -q 'minor'; then
+            if ! echo "$PR_TITLE" | grep -q '!'; then
+              echo "Changeset has `minor` changes. Please mark the PR as breaking by adding an exclamation mark to its title (e.g. fix!: xxx) or use a `patch` instead."
+              exit 1
+            fi
+          fi
 
           CHANGESET_DESCRIPTION=$(sed 's/^\s*\|\s*$//g' "$CHANGESET_FILE" | tail -n1)