feat(core/au): Handle mediafire.com downloads

lib/autoupdate.ps1

@@ -224,6 +224,11 @@ function get_hash_for_app([String] $app, $config, [String] $version, [String] $u
         $hashmode = 'sourceforge'
     }
 
+    if (!$hashfile_url -and $url -match "^.*mediafire.com\/\w+\/(?<random>\w+)\/(?<filename>.*)\/file(?:#\/.*)?$") {
+        $hashmode = 'mediafire'
+    }
+
+    debug $hashmode
     switch ($hashmode) {
         'extract' {
             $hash = find_hash_in_textfile $hashfile_url $substitutions $regex
@@ -251,6 +256,11 @@ function get_hash_for_app([String] $app, $config, [String] $version, [String] $u
             $hashfile_url = (strip_filename (strip_fragment "https://sourceforge.net/projects/$($matches['project'])/files/$($matches['file'])")).TrimEnd('/')
             $hash = find_hash_in_textfile $hashfile_url $substitutions '"$basename":.*?"sha1":\s"([a-fA-F0-9]{40})"'
         }
+        'mediafire' {
+            if ((Invoke-RestMethod -Uri $url) -match 'aria-label="Download file"\s+href="(?<url>[^"]+)"') {
+                $url = $Matches.url
+            }
+        }
     }
 
     if ($hash) {

lib/core.ps1

@@ -917,6 +917,13 @@ function handle_special_urls($url)
         # Reshapes the URL to avoid redirections
         $url = "https://downloads.sourceforge.net/project/$($matches['project'])/$($matches['file'])"
     }
+
+    # MediaFire.com
+    if ($url -match "^.*mediafire.com\/\w+\/(?<random>\w+)\/(?<filename>.*)\/file(?:#\/.*)?$") {
+        if ((Invoke-RestMethod -Uri $url) -match 'aria-label="Download file"\s+href="(?<url>[^"]+)"') {
+            $url = $Matches.url
+        }
+    }
     return $url
 }