fix: fix wrong outputSourceRange usage (#1482)

Author: AndreasCag

Diff for: lib/loaders/templateLoader.js

@@ -55,7 +55,7 @@ module.exports = function (source) {
   // errors
   if (compiled.errors && compiled.errors.length) {
     // 2.6 compiler outputs errors as objects with range
-    if (compiler.generateCodeFrame && finalOptions.outputSourceRange) {
+    if (compiler.generateCodeFrame && finalOptions.compilerOptions.outputSourceRange) {
       // TODO account for line offset in case template isn't placed at top
       // of the file
       loaderContext.emitError(