Merge pull request #192 from netlify/refactoring/reduce-to-some

Small code simplification (`Array.reduce()` -> `Array.some()`)

Author: swyxio

Diff for: lib/build.js

@@ -20,14 +20,12 @@ function haveBabelrc(functionsDir) {
 
   return (
     fs.existsSync(path.join(cwd, ".babelrc")) ||
-    functionsDir.split("/").reduce((foundBabelrc, dir) => {
-      if (foundBabelrc) return foundBabelrc;
-
+    functionsDir.split("/").some(dir => {
       const indexOf = functionsDir.indexOf(dir);
       const dirToSearch = functionsDir.substr(0, indexOf);
 
       return fs.existsSync(path.join(cwd, dirToSearch, ".babelrc"));
-    }, false)
+    })
   );
 }