[devdocsgjs: 1/2] Update xdg gem

[Andy Holmes <andyholmes src gnome org>]

commit f21b5c3d2d8680c92f98d56a4e7a19f5951355d1
Author: Senya <senya riseup net>
Date:   Mon Aug 31 14:37:16 2020 +0300

    Update xdg gem

 Gemfile.lock       | 2 +-
 lib/tasks/gir.thor | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/Gemfile.lock b/Gemfile.lock
index 3033306d..f2b6710b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -123,7 +123,7 @@ GEM
     unicode-display_width (1.4.1)
     unicode_utils (1.4.0)
     unix_utils (0.0.15)
-    xdg (2.2.3)
+    xdg (4.2.0)
     yajl-ruby (1.4.1)
 
 PLATFORMS
diff --git a/lib/tasks/gir.thor b/lib/tasks/gir.thor
index 0954343d..32881e25 100644
--- a/lib/tasks/gir.thor
+++ b/lib/tasks/gir.thor
@@ -17,7 +17,7 @@ class GirCLI < Thor
     if gir_dir
       glob = Dir.glob(gir_dir + '/*.gir')
     else
-      glob = XDG['DATA_DIRS'].glob('gir-1.0/*.gir')
+      glob = XDG::Data.new.directories.map {|dir| dir.glob('gir-1.0/*.gir') }.flatten
     end
     glob.each do |path|
       puts 'Generating scraper for ' + File.basename(path) + '...'