fix: sort regressions first when determining worst outcome (#214)

Co-authored-by: meorphis <eric@stainless.com>

Author: meorphis

dist/build.js

@@ -232,9 +232,14 @@ export function categorizeOutcome({
       .filter((r): r is Exclude<typeof categoryOutcome, null> => r !== null)
       .sort(
         (a, b) =>
-          // sort by severity then rank
+          // sort by regression status then severity then rank
+          (!(a.severity === "fatal" || b.severity === "fatal")
+            ? [true, null, false].indexOf(a.isRegression) -
+              [true, null, false].indexOf(b.isRegression)
+            : 0) ||
           conclusions.diagnostic.indexOf(a.severity) -
-            conclusions.diagnostic.indexOf(b.severity) || a.rank - b.rank,
+            conclusions.diagnostic.indexOf(b.severity) ||
+          a.rank - b.rank,
       )[0];
 
     return {