Stop indexing JS with --inferTSConfig

This behavior was dramatically slowing down the indexing of npm package
repos for questionable value. If the user wants to index JS code then
they can add that config to their `tsconfig.json` file. This flag was
added specifically for npm package repos.

Author: olafurpg

src/main.ts

@@ -157,10 +157,7 @@ export function index(options: Options): void {
     }
     if (!ts.sys.fileExists(tsconfigFileName)) {
       if (options.inferTSConfig) {
-        fs.writeFileSync(
-          tsconfigFileName,
-          '{"compilerOptions":{"allowJs":true}}'
-        )
+        fs.writeFileSync(tsconfigFileName, '{}')
       } else {
         console.error(`- ${options.projectDisplayName} (missing tsconfig.json)`)
         return