Fix BetterResolveLanguagesOutput

This commit fixes the BetterResolveLanguagesOutput interface, which
currently defines the `extractors` map values as tuples:

  [ { extractor_root: string; ... }, ]

Instead of arrays (which are what the CodeQL CLI produces):

  Array<{ extractor_root: string; ... }>

Author: cklin

src/codeql.ts

@@ -237,12 +237,10 @@ export interface BetterResolveLanguagesOutput {
     [alias: string]: string;
   };
   extractors: {
-    [language: string]: [
-      {
-        extractor_root: string;
-        extractor_options?: any;
-      },
-    ];
+    [language: string]: Array<{
+      extractor_root: string;
+      extractor_options?: any;
+    }>;
   };
 }