fix other mime types not updating without a server restart

lib/file/mimetypes.js

@@ -62,6 +62,8 @@ module.exports = {
 		return config.get.allowMimeNoMatch;
 	},
 
-	image, animatedImage, video, audio, other
+	getOther: () => other,
+
+	image, animatedImage, video, audio
 
 };

models/forms/makepost.js

@@ -246,7 +246,7 @@ module.exports = async (req, res) => {
 					await moveUpload(file, processedFile.filename, 'file');
 				}
 			};
-			if (mimeTypes.other.has(processedFile.mimetype)) {
+			if (mimeTypes.getOther().has(processedFile.mimetype)) {
 				//"other" mimes from config, overrides main type to avoid codec issues in browser or ffmpeg for unsupported filetypes
 				processedFile.hasThumb = false;
 				processedFile.attachment = true;