Restricted missing package message checking to first 2 lines (#1046)

Author: Josh Goldberg

src/input/findOriginalConfigurations.ts

@@ -117,7 +117,7 @@ export const findOriginalConfigurations = async (
 
 const getMissingPackageMessage = (error: Error) => {
     const match = /(Cannot find module|could not require|couldn't find the plugin) ([a-zA-Z0-9-_"'@/]+)/.exec(
-        error.message,
+        error.message.split('\n').slice(0, 2).join('\n'),
     );
     if (match === null) {
         return undefined;