JS: Extract .babelrc.json files in tests

Author: asgerf

javascript/extractor/src/com/semmle/js/extractor/Main.java

@@ -301,6 +301,8 @@ public void setupMatchers(ArgsParser ap) {
     // only extract HTML and JS by default
     addIncludesFor(includes, FileType.HTML);
     addIncludesFor(includes, FileType.JS);
+    includes.add("**/.babelrc*.json");
+
 
     // extract TypeScript if `--typescript` or `--typescript-full` was specified
     if (getTypeScriptMode(ap) != TypeScriptMode.NONE) {