Update modules to use #check_plugin_version_from_changelog

Author: rastating

modules/exploits/minimax_page_layout_builder_reflected_xss_shell_upload.rb

@@ -19,8 +19,7 @@ def initialize
   end
 
   def check
-    readme = normalize_uri(wordpress_url_plugins, 'page-layout-builder', 'readme.txt')
-    check_version_from_custom_file(readme, /=\s(\d\.\d\.\d)\s=/, '2.0.3')
+    check_plugin_version_from_changelog('page-layout-builder', 'readme.txt', '2.0.3')
   end
 
   def vulnerable_url

modules/exploits/safe_editor_xss_shell_upload.rb

@@ -24,8 +24,7 @@ def initialize
   end
 
   def check
-    readme = normalize_uri(wordpress_url_plugins, 'safe-editor', 'readme.txt')
-    check_version_from_custom_file(readme, /=\s(\d\.\d(\.\d)?)\s=/, '1.2')
+    check_plugin_version_from_changelog('safe-editor', 'readme.txt', '1.2')
   end
 
   def run

modules/exploits/tidio_gallery_reflected_xss_shell_upload.rb

@@ -19,8 +19,7 @@ def initialize
   end
 
   def check
-    readme = normalize_uri(wordpress_url_plugins, 'tidio-gallery', 'readme.txt')
-    check_version_from_custom_file(readme, /=\s(\d\.\d(\.\d)?)\s=/, '1.2')
+    check_plugin_version_from_changelog('tidio-gallery', 'readme.txt', '1.2')
   end
 
   def vulnerable_url