Fixes incorrect targets type def

Author: danieldelcore

.changeset/poor-pigs-applaud.md

@@ -0,0 +1,5 @@
+---
+'@codeshift/types': patch
+---
+
+Renames target to targets (inline with the spec)

packages/types/src/index.ts

@@ -1,5 +1,5 @@
 export interface CodeshiftConfig {
-  target?: string[];
+  targets?: string[];
   maintainers?: string[];
   description?: string;
   transforms?: Record<string, string>;