Merge pull request #44 from mschimk1/fix-source-maps-webpack5-istanbu…

…l-loader

fix: Handling of rawSourceMap string type in webpack5-istanbul-loader

src/loader/webpack5-istanbul-loader.ts

@@ -25,7 +25,7 @@ type RawSourceMap = {
 };
 
 function sanitizeSourceMap(rawSourceMap: RawSourceMap | string): RawSourceMap {
-  return rawSourceMap === "string" ? JSON.parse(rawSourceMap) : rawSourceMap;
+  return typeof rawSourceMap === "string" ? JSON.parse(rawSourceMap) : rawSourceMap;
 }
 
 export default function (