Feature/add gts gjs support (#235)

* Also Pass .gts,.gjs to YUIDoc Config

* Properly Remove Extensions from Generated Names

Author: kdagnan

lib/preprocessors/generate-yuidoc.js

@@ -122,7 +122,7 @@ function normalizePath(filePath, inputPath) {
   return filePath
     .replace(inputPath, '') // Remove root of path
     .replace(/\\/g, '/') // Convert windows-style slashes
-    .replace(/(\/index)?\.[jt]s/, ''); // Remove index.js / .js
+    .replace(/(\/index)?\.g?[jt]s/, ''); // Remove index.js / .js
 }
 
 function isAcceptableWarning(warning) {
@@ -131,7 +131,7 @@ function isAcceptableWarning(warning) {
 
 module.exports = function generateYUIDoc(inputPaths, project) {
   let json = new YUIDoc({
-    extension: '.js,.ts',
+    extension: '.js,.ts,.gjs,.gts',
     quiet: true,
     writeJSON: false,
     paths: inputPaths,